SECURITIES AND EXCHANGE COMMISSION


                             Washington, D.C. 20549


                                   F O R M 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934



                                 Date of Report
                                February 5, 1998



                          Abraxas Petroleum Corporation
             (Exact name of registrant as specified in its charter)


                                     Nevada
                 (State or other jurisdiction of incorporation)

          0-19118                                    74-2584033
        (Commission File Number)    (I.R.S. Employer Identification Number)



                        500 N. Loop 1604 East, Suite 100
                            San Antonio, Texas 78232
                    (Address of principal executive offices)


               Registrant's telephone number, including area code:
                                 (210) 490-4788







Item 5.  OTHER EVENTS

         On January 27, 1998,  Abraxas  Petroleum  Corporation  ("Abraxas")  and
Canadian  Abraxas  Petroleum  Limited,  a  wholly-owned  subsidiary  of  Abraxas
("Canadian  Abraxas"),   consummated  the  offering  of  $60  million  aggregate
principal amount of their 11 1/2% Senior Notes due 2004, Series C (the "Notes").
Interest on the Notes  accrues from their date of original  issuance (the "Issue
Date") and is payable  semi-annually  in arrears on May 1 and November 1 of each
year,  commencing on May 1, 1998, at the rate of 11.5% per annum.  The Notes are
redeemable,  in whole or in part, at the option of Abraxas and Canadian Abraxas,
on or after  November 1, 2000, at the  redemption  prices set forth below,  plus
accrued and unpaid  interest to the date of redemption,  if redeemed  during the
12-month period commencing on November 1 of the years set forth below:


Year                                             Percentage
2000                                              105.75%
2001                                              102.875
2002 and thereafter                               100.00%

In addition,  at any time on or prior to November 1, 1999,  Abraxas and Canadian
Abraxas may, at their option, redeem up to 35% of the aggregate principal amount
of the Notes originally  issued with the net cash proceeds of one or more equity
offerings,  at a  redemption  price equal to 111.5% of the  aggregate  principal
amount of the Notes to be redeemed, plus accrued and unpaid interest to the date
of  redemption;  provided,  however,  that,  after  giving  effect  to any  such
redemption,  at least 65% of the aggregate principal amount of the Notes remains
outstanding.

         The Notes are general  unsecured  obligations  of Abraxas and  Canadian
Abraxas  and rank pari  passu in right of  payment  to all  existing  and future
senior  indebtedness  of  Abraxas  and  Canadian  Abraxas  and on a parity  with
Abraxas'  and  Canadian  Abraxas' 11 1/2% Senior  Notes due 2004,  Series B (the
"Series B  Notes").  The Notes  rank  senior in right of  payment  to all future
subordinated  indebtedness  of  Abraxas  and  Canadian  Abraxas.  The Notes are,
however,  effectively  subordinated  to  secured  indebtedness  of  Abraxas  and
Canadian  Abraxas  to the  extent  of the  value  of the  assets  securing  such
indebtedness.  Abraxas has an existing  revolving  credit  facility (the "Credit
Facility")  which is secured by certain  assets of  Abraxas  and  guaranteed  by
Canadian Abraxas and is to be secured by certain assets of Canadian Abraxas. The
Credit  Facility has an  availability  of $40.0 million.  As of the date of this
Report,  Abraxas,  Canadian  Abraxas and the  Subsidiary  Guarantors (as defined
below) had $100,000 of secured indebtedness outstanding.

 
                                      2


         The Notes will be unconditionally guaranteed, jointly and severally, by
certain of Abraxas' and Canadian  Abraxas' future  subsidiaries (the "Subsidiary
Guarantors").  Upon  consummation  of the merger of a subsidiary of Abraxas with
and into  Vessels  Energy,  Inc.  ("Vessels"),  Vessels will become a Subsidiary
Guarantor.   The  guarantees  will  be  general  unsecured  obligations  of  the
Subsidiary Guarantors and will rank pari passu in right of payment to all senior
indebtedness of the Subsidiary  Guarantors and senior in right of payment to all
subordinated  indebtedness of the Subsidiary Guarantors.  The Guarantees will be
effectively subordinated to secured indebtedness of the Subsidiary Guarantors to
the extent of the value of the assets securing such indebtedness.

         Upon a Change of Control (as  defined in the  Indenture  governing  the
Notes),  each  holder of the Notes  will have the right to require  Abraxas  and
Canadian  Abraxas to  repurchase  all or a portion of such  holder's  Notes at a
redemption price equal to 101% of the principal amount thereof, plus accrued and
unpaid  interest to the date of  repurchase.  In addition,  Abraxas and Canadian
Abraxas  will be  obligated  to offer  to  repurchase  the  Notes at 100% of the
principal  amount  thereof  plus  accrued  and  unpaid  interest  to the date of
repurchase in the event of certain asset sales.

         The net proceeds to Abraxas and  Canadian  Abraxas from the offering of
the  Notes  were  approximately  $62.7  million  after  deducting   underwriting
discounts  and  estimated  offering  expenses  payable by Abraxas  and  Canadian
Abraxas. Abraxas and Canadian Abraxas used the net proceeds to repay all amounts
outstanding  under its  Credit  Facility  (except  for  $100,000  which  remains
outstanding)  and to provide  working  capital  for general  corporate  purposes
including future acquisitions and development of producing properties.


                                       3



Item 7.  FINANCIAL STATEMENTS AND EXHIBITS.

(C)      Exhibits.

         The following exhibits are filed as part of this report:

NUMBER                              DOCUMENT

4.1                                 Indenture dated January 27, 1998 by
                                    and among Abraxas Petroleum
                                    Corporation ("Abraxas"), Canadian
                                    Abraxas Petroleum Limited ("Canadian
                                    Abraxas") and IBJ Schroeder Bank and
                                    Trust Company.

10.1                                Purchase Agreement dated January 20,
                                    1998 by and among Abraxas, Canadian
                                    Abraxas and Jefferies & Company, Inc.
                                    (the "Initial Purchaser").

10.2                                Registration Rights Agreement dated
                                    January 27, 1998 by and among
                                    Abraxas, Canadian Abraxas and the
                                    Initial Purchaser.

10.3                                Amendment No. 2 to Amended and
                                    Restated Credit Agreement dated
                                    January 27, 1998 by and among
                                    Abraxas, Bankers Trust Company, ING
                                    (U.S.) Capital Corporation and the
                                    lenders named therein.




                                       4



                                   SIGNATURES

         Pursuant to the requirement of the Securities Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                            ABRAXAS PETROLEUM CORPORATION



                                            By:   /s/ Chris Williford
                                                     Chris Williford
                         Executive Vice President, Chief
                         Financial Officer and Treasurer



Dated: February 5, 1998

                                       5








                                                               EXHIBIT 4.1










                          ABRAXAS PETROLEUM CORPORATION

                                       and

                       CANADIAN ABRAXAS PETROLEUM LIMITED,

                                   as Issuers

                                       and

                       IBJ SCHRODER BANK & TRUST COMPANY,

                                   as Trustee




                                    INDENTURE

                          Dated as of January 27, 1998




                                   $60,000,000
                     11 1/2% Senior Notes due 2004, Series C

                                       and

                                  $275,000,000
                     11 1/2% Senior Notes due 2004, Series D









                              CROSS-REFERENCE TABLE
 TIA                                                            Indenture
Section                                     
Section

310(a)(1)..................................................7.10
      (a)(2)...............................................7.10
      (a)(3)...............................................N.A.
      (a)(4)...............................................N.A.
      (a)(5)...............................................7.08; 7.10,
 ...........................................................7.11
      (b)..................................................7.08; 7.10,
 ...........................................................10.02
      (c)..................................................N.A.
311(a).....................................................7.11
      (b)..................................................7.11
      (c)..................................................N.A.
312(a).....................................................2.05
      (b).................................................10.03
      (c).................................................10.03
313(a).....................................................7.06
      (b)(1)...............................................N.A.
      (b)(2)...............................................7.06
      (c)..................................................7.06; 10.02
      (d)..................................................7.06
314(a).....................................................4.06; 4.08;
 ..........................................................10.02
      (b)..................................................N.A.
      (c)(1)...............................................7.02, 10.04
      (c)(2)...............................................7.02, 10.04
      (c)(3)...............................................N.A.
      (d)..................................................N.A.
      (e).................................................10.05
      (f)..................................................N.A.
315(a).....................................................7.01(b)
      (b)..................................................7.05; 10.02
      (c)..................................................7.01(a)
      (d)..................................................7.01(c)
      (e)..................................................6.11
316(a)(last sentence)......................................2.09
      (a)(1)(A)............................................6.05
      (a)(1)(B)............................................6.04
      (a)(2)...............................................N.A.
      (b)..................................................6.07
      (c)..................................................9.04



317(a)(1)..................................................6.08
      (a)(2)...............................................6.09
      (b)..................................................2.04
318(a)....................................................10.01
      (c).................................................10.01
- ----------------------

N.A. means Not Applicable

NOTE: This  Cross-Reference  Table shall not, for any purpose, be deemed to be a
part of the Indenture.




                                                  TABLE OF CONTENTS


                                                                     Page

      ARTICLE ONE    DEFINITIONS AND INCORPORATION BY REFERENCE
      SECTION 1.01   Definitions                                       1
      SECTION 1.02.  Incorporation by Reference of TIA                18
      SECTION 1.03.  Rules of Construction                            18

      ARTICLE TWO    THE NOTES
      SECTION 2.01.  Execution and Authentication;
                     Aggregate Principal Amount                       19
      SECTION 2.03.  Registrar and Paying Agent                       20
      SECTION 2.04.  Paying Agent To Hold Assets in Trust             20
      SECTION 2.05.  Holder Lists                                     20
      SECTION 2.06.  Transfer and Exchange                            21
      SECTION 2.07.  Replacement Notes                                21
      SECTION 2.08.  Outstanding Notes                                21
      SECTION 2.09.  Treasury Notes                                   22
      SECTION 2.10.  Temporary Notes                                  22
      SECTION 2.11.  Cancellation                                     22
      SECTION 2.12.  Defaulted Interest                               22
      SECTION 2.13.  CUSIP Number                                     23
      SECTION 2.14.  Deposit of Monies                                23
      SECTION 2.15.  Restrictive Legends                              23
      SECTION 2.16.  Book-Entry Provisions for Global Security        24
      SECTION 2.17.  Special Transfer Provisions                      25
      SECTION 2.18.  Liquidated Damages Under Registration 
                     Rights Agreement                                 27

      ARTICLE THREE  REDEMPTION
      SECTION 3.01.  Notices to Trustee                               27
      SECTION 3.02.  Selection of Notes To Be Redeemed                27
      SECTION 3.03.  Optional Redemption                              27
      SECTION 3.04.  Notice of Redemption                             28
      SECTION 3.05.  Effect of Notice of Redemption                   28


      SECTION 3.06.  Deposit of Redemption Price                      29
      SECTION 3.07.  Notes Redeemed in Part                           29

      ARTICLE FOUR   COVENANTS
      SECTION 4.01.  Payment of Notes                                 29
      SECTION 4.02.  Maintenance of Office or Agency                  29
      SECTION 4.03.  Corporate Existence                              29
      SECTION 4.04.  Payment of Taxes and Other Claims                30
      SECTION 4.05.  Maintenance of Properties and Insurance          30
      SECTION 4.06.  Compliance Certificate; Notice of Default        30
      SECTION 4.07.  Compliance with Laws                             31
      SECTION 4.08.  Reports to Holders                               31
      SECTION 4.09.  Waiver of Stay, Extension or Usury Laws          31
      SECTION 4.10.  Limitation on Restricted Payments                31
      SECTION 4.11.  Limitation on Transactions with Affiliates       33
      SECTION 4.12.  Limitation on Incurrence of Additional
                     Indebtedness                                     33
      SECTION 4.13.  Limitation on Dividend and Other Payment
                     Restrictions Affecting Restricted Subsidiaries   34
      SECTION 4.14.  Limitation on Restricted and
                     Unrestricted Subsidiaries                        34
      SECTION 4.15.  Change of Control                                35
      SECTION 4.16.  Limitation on Asset Sales                        37
      SECTION 4.17.  Limitation on Preferred Stock of
                     Restricted Subsidiaries                          39
      SECTION 4.18.  Limitation on Liens                              39
      SECTION 4.19.  Limitation on Conduct of Business                39
      SECTION 4.20.  Additional Subsidiary Guarantees                 39
      SECTION 4.21.  Limitation on Restrictive Covenants              40

      ARTICLE FIVE   SUCCESSOR CORPORATION
      SECTION 5.1.   Merger, Consolidation and Sale of Assets         40
      SECTION 5.02.  Successor Corporation Substituted                41

      ARTICLE SIX    REMEDIES
      SECTION 6.01.  Events of Default                                41
      SECTION 6.02.  Acceleration                                     42
      SECTION 6.03.  Other Remedies                                   43
      SECTION 6.04.  Waiver of Past Defaults                          43
      SECTION 6.05.  Control by Majority                              43
      SECTION 6.06.  Limitation on Suits                              43
      SECTION 6.07.  Right of Holders To Receive Payment              44
      SECTION 6.08.  Collection Suit by Trustee                       44
      SECTION 6.09.  Trustee May File Proofs of Claim                 44
      SECTION 6.10   Priorities                                       44
      SECTION 6.11.  Undertaking for Costs                            45
      SECTION 6.12.  Restoration of Rights and Remedies               45


      ARTICLE SEVEN  TRUSTEE
      SECTION 7.01.  Duties of Trustee                                45
      SECTION 7.02.  Rights of Trustee                                46
      SECTION 7.03.  Individual Rights of Trustee                     47
      SECTION 7.04.  Trustee's Disclaimer                             47
      SECTION 7.05.  Notice of Default                                47
      SECTION 7.06.  Reports by Trustee to Holders                    47
      SECTION 7.07.  Compensation and Indemnity                       47
      SECTION 7.08.  Replacement of Trustee                           48
      SECTION 7.09.  Successor Trustee by Merger, Etc                 49
      SECTION 7.10   Eligibility; Disqualification                    49
      SECTION 7.11   Preferential Collection of Claims
                     Against Issuers                                  49

      ARTICLE EIGHT  DISCHARGE OF INDENTURE; DEFEASANCE
      SECTION 8.01   Termination of Issuers' Obligations              49
      SECTION 8.02.  Application of Trust Money                       51
      SECTION 8.03.  Repayment to the Issuers                         51
      SECTION 8.04.  Reinstatement                                    51
      SECTION 8.05.  Acknowledgment of Discharge by Trustee           51

      ARTICLE NINE   MODIFICATION OF THE INDENTURE
      SECTION 9.01.  Without Consent of Holders                       52
      SECTION 9.02.  With Consent of Holders                          52
      SECTION 9.03.  Compliance with TIA                              52
      SECTION 9.04.  Revocation and Effect of Consents                52
      SECTION 9.05.  Notation on or Exchange of Notes                 53
      SECTION 9.06.  Trustee To Sign Amendments, Etc                  53

      ARTICLE TEN    MISCELLANEOUS
      SECTION 10.01. TIA Controls                                     53
      SECTION 10.02. Notices                                          53
      SECTION 10.03. Communications by Holders with Other Holders     54
      SECTION 10.04. Certificate and Opinion as to Conditions
                     Precedent                                        54
      SECTION 10.05. Statements Required in Certificate or
                     Opinion                                          55
      SECTION 10.06. Rules by Trustee, Paying Agent, Registrar        55
      SECTION 10.07. Legal Holidays                                   55
      SECTION 10.08. Governing Law                                    55
      SECTION 10.09. No Adverse Interpretation of Other Agreements    55
      SECTION 10.10. No Personal Liability                            55
      SECTION 10.11. Successors                                       56
      SECTION 10.12. Duplicate Originals                              56
      SECTION 10.13. Severability                                     56
      SECTION 10.14. Independence of Covenants                        56



      ARTICLE ELEVEN GUARANTEE OF NOTES
      SECTION 11.01. Unconditional Guarantee                          56
      SECTION 11.02. Limitations on Guarantees                        57
      SECTION 11.03. Execution and Delivery of Guarantee              57
      SECTION 11.04. Release of a Subsidiary Guarantor                58
      SECTION 11.05. Waiver of Subrogation                            58
      SECTION 11.06. Immediate Payment                                58
      SECTION 11.07. No Set-Off                                       59
      SECTION 11.08. Obligations Absolute                             59
      SECTION 11.09. Obligations Continuing                           59
      SECTION 11.10. Obligations Not Reduced                          59
      SECTION 11.11. Obligations Reinstated                           59
      SECTION 11.12. Obligations Not Affected                         59
      SECTION 11.13. Waiver                                           60
      SECTION 11.14. No Obligation To Take Action Against
                     the Issuers                                      60
      SECTION 11.15. Dealing with the Issuers and Others              61
      SECTION 11.16. Default and Enforcement                          61
      SECTION 11.17. Amendment, Etc                                   61
      SECTION 11.18. Acknowledgment                                   61
      SECTION 11.19. Costs and Expenses                               61
      SECTION 11.20. No Merger or Waiver; Cumulative Remedies         61
      SECTION 11.21. Survival of Obligations                          62
      SECTION 11.22. Guarantee in Addition to Other Obligation        62
      SECTION 11.23. Severability                                     62
      SECTION 11.24. Successors and Assigns                           62






Exhibit A - Form of Initial Note.....................................A-1
Exhibit B - Form of Exchange Note....................................B-1
Exhibit C - Form of Certificate To Be Delivered in Connection
            with Transfers to Non-QIB Accredited Investors...........C-1
Exhibit D - Form of Certificate To Be Delivered in Connection
            with Transfers Pursuant to Regulation S .................D-1
Exhibit E - Guarantee................................................E-1


Note: This Table of Contents shall not, for any purpose, be deemed to be part of
the Indenture.






         INDENTURE,  dated as of  January  27,  1998,  among  Abraxas  Petroleum
Corporation,  a Nevada  corporation (the "Company"),  Canadian Abraxas Petroleum
Limited,  an Alberta  corporation  and wholly  owned  subsidiary  of the Company
("Canadian  Abraxas" and,  together  with the Company,  the  "Issuers")  and IBJ
Schroder  Bank  &  Trust  Company,  a New  York  corporation,  as  Trustee  (the
"Trustee").

         The Issuers  have duly  authorized  the creation of an issue of 11 1/2%
Senior Notes due 2004,  Series C (the "Initial  Notes") and 11 1/2% Senior Notes
due 2004,  Series D (the  "Exchange  Notes")  to be issued in  exchange  for the
Initial Notes pursuant to the Registration  Rights Agreement (as defined herein)
and, to provide  therefor,  the Issuers have duly  authorized  the execution and
delivery of this Indenture.  The Notes (as defined herein) will be guaranteed on
a senior  basis by each of the  Company's  future  Restricted  Subsidiaries  (as
defined  herein)  (collectively,   the  "Subsidiary  Guarantors").   All  things
necessary to make the Notes,  when duly issued and executed by the Issuers,  and
authenticated and delivered hereunder, the valid obligations of the Issuers, and
to make this Indenture a valid and binding  agreement of the Issuers,  have been
done.

         Each  party  hereto  agrees as  follows  for the  benefit  of the other
parties and for the equal and ratable benefit of the Holders of the Notes.


                                   ARTICLE ONE

                   DEFINITIONS AND INCORPORATION BY REFERENCE

         SECTION 1.01......Definitions.

         "Acquired  Indebtedness"  means  Indebtedness of a Person or any of its
Subsidiaries  (i)  existing  at  the  time  such  Person  becomes  a  Restricted
Subsidiary or at the time it merges or  consolidates  with the Company or any of
its Restricted Subsidiaries or (ii) which becomes Indebtedness of the Company or
a Restricted  Subsidiary in connection  with the acquisition of assets from such
Person,  in each case not incurred in  connection  with, or in  anticipation  or
contemplation  of,  such  Person  becoming  a  Restricted   Subsidiary  or  such
acquisition, merger or consolidation.

         "Additional   Interest"  shall  have  the  meaning  set  forth  in  the
Registration Rights Agreement.

         "Additional Series D Notes" means any Exchange Notes issued in exchange
for Series A/B Notes pursuant to the Registration Rights Agreement.

         "Adjusted    Consolidated   Net   Tangible   Assets"   means   (without
duplication),  as of the date of  determination,  (a) the sum of (i)  discounted
future net  revenues  from  proved oil and gas  reserves  of the Company and its
consolidated  Subsidiaries,  calculated in accordance with Commission guidelines

                                       1


(before  any  state  or  federal  income  tax),  as  estimated  by a  nationally
recognized firm of independent  petroleum engineers as of a date no earlier than
the date of the Company's latest annual consolidated  financial  statements,  as
increased by, as of the date of determination,  the estimated  discounted future
net revenues from (A) estimated  proved oil and gas reserves  acquired since the
date of such  year-end  reserve  report,  and (B) estimated oil and gas reserves
attributable  to upward  revisions  of  estimates of proved oil and gas reserves
since the date of such year-end  reserve report due to exploration,  development
or  exploitation  activities,   in  each  case  calculated  in  accordance  with
Commission  guidelines  (utilizing the prices utilized in such year-end  reserve
report),  and  decreased  by,  as of the date of  determination,  the  estimated
discounted  future net revenues from (C)  estimated  proved oil and gas reserves
produced or disposed of since the date of such year-end  reserve  report and (D)
estimated oil and gas reserves  attributable to downward  revisions of estimates
of proved oil and gas reserves  since the date of such year-end  reserve  report
due to changes  in  geological  conditions  or other  factors  which  would,  in
accordance with standard industry practice,  cause such revisions,  in each case
calculated  in  accordance  with  Commission  guidelines  (utilizing  the prices
utilized in such year-end reserve report); provided,  however, that, in the case
of each of the  determinations  made  pursuant to clauses (A) through (D),  such
increases  and  decreases  shall  be as  estimated  by the  Company's  petroleum
engineers,  unless in the event that  there is a Material  Change as a result of
such  acquisitions,  dispositions or revisions,  then the discounted  future net
revenues  utilized  for  purposes of this clause  (a)(i)  shall be  confirmed in
writing,  by a nationally  recognized  firm of independent  petroleum  engineers
(which may be the  Company's  independent  petroleum  engineers  who prepare the
Company's  annual  reserve  report)  plus (ii) the  capitalized  costs  that are
attributable  to oil and gas properties of the Company and its  Subsidiaries  to
which no proved oil and gas reserves are  attributable,  based on the  Company's
books and records as of a date no earlier than the date of the Company's  latest
annual or quarterly financial statements,  plus (iii) the Net Working Capital on
a date no earlier than the date of the Company's latest  consolidated  annual or
quarterly  financial  statements  plus (iv) with respect to each other  tangible
asset of the Company or its consolidated Restricted  Subsidiaries,  specifically
including, but not to the exclusion of any other qualifying tangible assets, the
Company's or its consolidated Restricted Subsidiaries,  gas producing facilities
and unproved oil and gas properties  (less any remaining  deferred  income taxes
which have been allocated to such gas processing  facilities in connection  with
the acquisition thereof), land, equipment,  leasehold improvements,  investments
carried  on the  equity  method,  restricted  cash  and the  carrying  value  of
marketable  securities,  the  greater  of (A) the net book  value of such  other
tangible  asset  on a date no  earlier  than the  date of the  Company's  latest
consolidated  annual or  quarterly  financial  statements  or (B) the  appraised
value, as estimated by a qualified  Independent  Advisor, of such other tangible
assets of the Company and its Restricted  Subsidiaries,  as of a date no earlier
than the date of the Company's  latest audited  financial  statements  minus (b)
minority  interests  and,  to the extent  not  otherwise  taken into  account in
determining  Adjusted  Consolidated  Net  Tangible  Assets,  any  gas  balancing

                                       2


liabilities  of  the  Company  and  its  consolidated   Restricted  Subsidiaries
reflected in the Company's latest audited financial statements.  In addition to,
but without  duplication  of, the  foregoing,  for purposes of this  definition,
"Adjusted  Consolidated  Net Tangible  Assets" shall be calculated  after giving
effect,  on a pro forma  basis,  to (1) any  Investment  not  prohibited  by the
Indenture,  to and including the date of the transaction giving rise to the need
to calculate Adjusted  Consolidated Net Tangible Assets (the "Assets Transaction
Date"),  in any other Person  that,  as a result of such  Investment,  becomes a
Restricted Subsidiary of the Company, (2) the acquisition,  to and including the
Assets  Transaction  Date (by  merger,  consolidation  or  purchase  of stock or
assets), of any business or assets,  including,  without  limitation,  Permitted
Industry  Investments,  and  (3) any  sales  or  other  dispositions  of  assets
permitted by the Indenture  (other than sales of  Hydrocarbons  or other mineral
products in the ordinary course of business) occurring on or prior to the Assets
Transaction Date.

         "Affiliate"  means, with respect to any specified Person, (a) any other
Person who directly or indirectly through one or more  intermediaries  controls,
or is controlled by, or under common control with, such specified Person and (b)
any Related  Person of such Person.  The term  "control"  means the  possession,
directly or  indirectly,  of the power to direct or cause the  direction  of the
management  and policies of a Person,  whether  through the  ownership of voting
securities,   by  contract  or  otherwise;   and  the  terms  "controlling"  and
"controlled" have meanings correlative of the foregoing.

         "Affiliate Transaction" has the meaning provided in Section 4.11.

         "Agent" means any Registrar, Paying Agent or co-Registrar.

         "Agent Members" has the meaning provided in Section 2.16.

         "Asset  Acquisition"  means (a) an  Investment  by the  Company  or any
Restricted  Subsidiary  in any other Person  pursuant to which such Person shall
become a Restricted  Subsidiary,  or shall be merged with or into the Company or
any  Restricted  Subsidiary,  or  (b)  the  acquisition  by the  Company  or any
Restricted  Subsidiary  of the assets of any  Person  (other  than a  Restricted
Subsidiary)  which  constitute  all or  substantially  all of the assets of such
Person or comprises any division or line of business of such Person or any other
properties  or  assets  of such  Person  other  than in the  ordinary  course of
business.

         "Asset Sale" means any direct or indirect sale,  issuance,  conveyance,
transfer,  exchange,  lease  (other than  operating  leases  entered into in the
ordinary  course of  business),  assignment  or other  transfer for value by the
Company or any of its Restricted  Subsidiaries (including any Sale and Leaseback
Transaction) to any Person other than the Company or a Restricted  Subsidiary of
(a) any Capital Stock of any Restricted Subsidiary; or (b) any other property or
assets  (including  any  interests  therein)  of the  Company or any  Restricted
Subsidiary,  including any  disposition by means of a merger,  consolidation  or
similar transaction;  provided,  however, that Asset Sales shall not include (i)

                                       3


the  sale,  lease,   conveyance,   disposition  or  other  transfer  of  all  or
substantially all of the assets of the Company in a transaction which is made in
compliance  with the  provisions  of Section  5.01,  (ii) any  Investment  in an
Unrestricted  Subsidiary  which is made in  compliance  with the  provisions  of
Section  4.10,  (iii)  disposals or  replacements  of obsolete  equipment in the
ordinary course of business,  (iv) the sale, lease,  conveyance,  disposition or
other transfer (each, a "Transfer") by the Company or any Restricted  Subsidiary
of assets or property to the Company or one or more Restricted Subsidiaries, (v)
any  disposition  of  Hydrocarbons  or other  mineral  products for value in the
ordinary  course  of  business  and  (vi) the  Transfer  by the  Company  or any
Restricted  Subsidiary of assets or property in the ordinary course of business;
provided, however, that the aggregate amount (valued at the fair market value of
such  assets or property  at the time of such  Transfer)  of all such assets and
property  Transferred  since the Series A/B Issue Date  pursuant  to this clause
(vi) shall not exceed $1,000,000 in any one year.

         "Authenticating Agent" has the meaning provided in Section 2.02.

         "Bankruptcy  Law" means  Title 11, U.S.  Code or any  similar  Federal,
state or foreign law for the relief of debtors.

         "Board of Directors"  means, as for any Person,  the board of directors
of such Person or any duly authorized committee thereof.

         "Board  Resolution"  means,  with  respect to any  Person,  a copy of a
resolution  certified by the Secretary or an Assistant  Secretary of such Person
to be in full force and effect on the date of such certification,  and delivered
to the Trustee.

         "Business Day" means any day other than a Saturday, Sunday or any other
day on which  banking  institutions  in the City of New  York  are  required  or
authorized by law or other governmental action to be closed.

         "Canadian Abraxas" means the party named as such in the first paragraph
of this Indenture  until a successor  replaces it pursuant to this Indenture and
thereafter means such successor.

         "Capital  Stock"  means  (i)  with  respect  to any  Person  that  is a
corporation, any and all shares, interests,  participations or other equivalents
(however  designated  and  whether  voting  or  non-voting)  of  capital  stock,
including each class of Common Stock and Preferred  Stock of such Person and any
and all rights,  warrants or options  exchangeable  for or convertible into such
capital stock and (ii) with respect to any Person that is not a corporation, any
and all partnership or other equity interests of such Person.

         "Capitalized  Lease Obligation" means, as to any Person, the discounted
present  value of the rental  obligations  of such  Person  under a lease of (or

                                       4


other agreement conveying the right to use) any property (whether real, personal
or mixed) that is required to be classified and accounted for as a capital lease
obligation at such date, determined in accordance with GAAP.

         "Cascade" means Cascade Oil & Gas Ltd., an Alberta, Canada corporation.

         "Cash  Equivalents"  means (a) marketable direct obligations issued by,
or unconditionally  guaranteed by, the United States Government or issued by any
agency thereof and backed by the full faith and credit of the United States,  in
each case maturing  within one year from the date of  acquisition  thereof;  (b)
marketable  direct  obligations  issued  by any  state of the  United  States of
America  or  any  political   subdivision  of  any  such  state  or  any  public
instrumentality  thereof  maturing  within one year from the date of acquisition
thereof and, at the time of  acquisition,  having one of the two highest ratings
obtainable  from  either  Standard  &  Poor's  Corporation  ("S&P")  or  Moody's
Investors Service, Inc. ("Moody's");  (c) commercial paper maturing no more than
one year from the date of  creation  thereof  and,  at the time of  acquisition,
having a rating  of at least  A-1  from S&P or at least  P-1 from  Moody's;  (d)
certificates  of deposit or bankers'  acceptances  maturing within one year from
the date of acquisition  thereof issued by any bank organized  under the laws of
the United States of America or any state thereof or the District of Columbia or
any United  States  branch of a foreign  bank having at the date of  acquisition
thereof  combined  capital  and  surplus  of not  less  than  $250,000,000;  (e)
repurchase  obligations  with a term of not more than seven days for  underlying
securities  of the types  described  in clause (a) above;  and (f) money  market
mutual or similar funds having assets in excess of $100,000,000.

         "Change  of  Control"  means  the  occurrence  of  one or  more  of the
following  events:  (a) any sale,  lease,  exchange  or other  transfer  (in one
transaction or a series of related  transactions) of all or substantially all of
the assets of the Company to any Person or group of related Persons for purposes
of Section  13(d) of the Exchange Act (a "Group")  (whether or not  otherwise in
compliance  with the  provisions  of this  Indenture);  (b) the  approval by the
holders  of  Capital  Stock  of the  Company  of any  plan or  proposal  for the
liquidation  or  dissolution  of  the  Company  (whether  or  not  otherwise  in
compliance with the provisions of this Indenture); (c) any Person or Group shall
become the owner,  directly or indirectly,  beneficially or of record, of shares
representing more than 35% of the aggregate ordinary voting power represented by
the issued and outstanding  Capital Stock of the Company; or (d) the replacement
of a majority of the Board of Directors  of the Company  over a two-year  period
from the directors who  constituted the Board of Directors of the Company at the
beginning of such period with directors  whose  replacement  shall not have been
approved (by  recommendation,  nomination or election,  as the case may be) by a
vote of at least a majority of the Board of  Directors of the Company then still
in office who either were members of such Board of Directors at the beginning of
such  period  or whose  election  as a member  of such  Board of  Directors  was
previously so approved.

         "Change of Control Offer" has the meaning provided in Section 4.15.

                                       5

         "Change of Control  Payment  Date" has the meaning  provided in Section
4.15.

         "Commission" means the SEC.

         "Common  Stock" of any Person  means any and all shares,  interests  or
other  participations in, and other equivalents  (however designated and whether
voting or non-voting) of such Person's common stock,  whether outstanding on the
Issue Date or issued after the Issue Date, and includes, without limitation, all
series and classes of such common stock.

         "Company" means Abraxas Petroleum Corporation, a Nevada corporation.

         "Company Properties" means all Properties,  and equity,  partnership or
other ownership interests therein, that are related or incidental to, or used or
useful in connection  with, the conduct or operation of any business  activities
of the Company or the Subsidiaries, which business activities are not prohibited
by the terms of the Indenture.

         "Consolidated   EBITDA"  means,  for  any  period,   the  sum  (without
duplication) of (a) Consolidated  Net Income and (b) to the extent  Consolidated
Net Income has been reduced thereby, (i) all income taxes of the Company and its
Restricted  Subsidiaries paid or accrued in accordance with GAAP for such period
(other than income taxes attributable to extraordinary,  unusual or nonrecurring
gains or losses  or taxes  attributable  to sales or  dispositions  outside  the
ordinary course of business),  (ii)  Consolidated  Interest  Expense,  (iii) the
amount of any Preferred  Stock  dividends paid by the Company and its Restricted
Subsidiaries and (iv)  Consolidated  Non-cash  Charges,  less any non-cash items
increasing  Consolidated  Net Income for such  period,  all as  determined  on a
consolidated basis for the Company and its Restricted Subsidiaries in accordance
with GAAP.

         "Consolidated  EBITDA  Coverage  Ratio"  means,  with  respect  to  the
Company,  the ratio of (a)  Consolidated  EBITDA of the Company  during the four
full fiscal  quarters  for which  financial  information  in respect  thereof is
available  (the  "Four  Quarter  Period")  ending on or prior to the date of the
transaction  giving  rise  to the  need to  calculate  the  Consolidated  EBITDA
Coverage Ratio (the "Transaction Date") to (b) Consolidated Fixed Charges of the
Company for the Four Quarter  Period.  In addition to and without  limitation of
the  foregoing,  for  purposes  of this  definition,  "Consolidated  EBITDA" and
"Consolidated  Fixed Charges" shall be calculated  after giving effect  (without
duplication) on a pro forma basis for the period of such  calculation to (a) the
incurrence  or  repayment  of  any  Indebtedness  of the  Company  or any of its
Restricted  Subsidiaries  (and the  application of the proceeds  thereof) giving
rise to the need to make such  calculation  and any  incurrence  or repayment of
other Indebtedness (and the application of the proceeds thereof), other than the
incurrence or repayment of  indebtedness  in the ordinary course of business for
working  capital  purposes  pursuant to working  capital  facilities,  occurring

                                       6


during the Four Quarter Period or at any time  subsequent to the last day of the
Four  Quarter  Period  and on or  prior  to the  Transaction  Date,  as if  such
incurrence or repayment, as the case may be (and the application of the proceeds
thereof), occurred on the first day of the Four Quarter Period and (b) any Asset
Sales  or  Asset  Acquisitions   (including,   without  limitation,   any  Asset
Acquisition  giving rise to the need to make such calculation as a result of the
Company or one of its Restricted  Subsidiaries (including any Person who becomes
a  Restricted  Subsidiary  as a  result  of the  Asset  Acquisition)  incurring,
assuming  or  otherwise  being  liable  for  Acquired  Indebtedness,   and  also
including,  without  limitation,  any  Consolidated  EBITDA  attributable to the
assets which are the subject of the Asset  Acquisition  or Asset Sale during the
Four Quarter  Period)  occurring  during the Four Quarter  Period or at any time
subsequent  to the last day of the Four  Quarter  Period  and on or prior to the
Transaction  Date,  as if such Asset Sale or Asset  Acquisition  (including  the
incurrence, assumption or liability for any such Acquired Indebtedness) occurred
on the  first  day of the Four  Quarter  Period.  If the  Company  or any of its
Restricted  Subsidiaries  directly or indirectly  guarantees  Indebtedness  of a
third Person, the preceding sentence shall give effect to the incurrence of such
guaranteed  Indebtedness as if the Company or the Restricted Subsidiary,  as the
case  may be,  had  directly  incurred  or  otherwise  assumed  such  guaranteed
Indebtedness.  Furthermore,  in  calculating  "Consolidated  Fixed  Charges" for
purposes  of  determining  the  denominator  (but  not  the  numerator)  of this
"Consolidated  EBITDA Coverage Ratio," (i) interest on outstanding  Indebtedness
determined  on a  fluctuating  basis as of the  Transaction  Date and which will
continue to be so  determined  thereafter  shall be deemed to have  accrued at a
fixed  rate per annum  equal to the rate of  interest  on such  Indebtedness  in
effect on the Transaction  Date; (ii) if interest on any  Indebtedness  actually
incurred on the  Transaction  Date may  optionally  be determined at an interest
rate based upon a factor of a prime or similar  rate, a  eurocurrency  interbank
offered  rate,  or  other  rates,  then  the  interest  rate  in  effect  on the
Transaction  Date will be deemed to have been in effect  during the Four Quarter
Period;  (iii)   notwithstanding   clauses  (i)  and  (ii)  above,  interest  on
Indebtedness  determined on a fluctuating  basis, to the extent such interest is
covered by agreements relating to Interest Swap Obligations,  shall be deemed to
accrue at the rate per annum  resulting  after giving effect to the operation of
such agreements.

         "Consolidated Fixed Charges" means, with respect to the Company for any
period,  the sum,  without  duplication,  of (a)  Consolidated  Interest Expense
(including any premium or penalty paid in connection  with redeeming or retiring
Indebtedness of the Company and its Restricted  Subsidiaries prior to the stated
maturity thereof pursuant to the agreements  governing such Indebtedness),  plus
(b) the  product of (i) the  amount of all  dividend  payments  on any series of
Preferred  Stock of the Company (other than dividends paid in Qualified  Capital
Stock) paid, accrued or scheduled to be paid or accrued during such period times
(ii) a fraction,  the numerator of which is one and the  denominator of which is
one minus  the then  current  effective  consolidated  federal,  state and local
income tax rate of such Person, expressed as a decimal.

                                       7


         "Consolidated  Interest Expense" means, with respect to the Company for
any period, the sum of, without  duplication:  (a) the aggregate of the interest
expense  of  the  Company  and  its  Restricted  Subsidiaries  for  such  period
determined on a consolidated  basis in accordance with GAAP,  including  without
limitation,  (i) any amortization of original issue discount, (ii) the net costs
under Interest Swap  Obligations,  (iii) all  capitalized  interest and (iv) the
interest  portion  of any  deferred  payment  obligation;  and (b) the  interest
component of Capitalized Lease Obligations paid,  accrued and/or scheduled to be
paid or accrued by the  Company  and its  Restricted  Subsidiaries  during  such
period, as determined on a consolidated basis in accordance with GAAP.

         "Consolidated  Net Income"  means,  with respect to the Company for any
period,  the  aggregate  net income (or loss) of the Company and its  Restricted
Subsidiaries for such period on a consolidated  basis,  determined in accordance
with  GAAP;  provided,  however,  that there  shall be  excluded  therefrom  (a)
after-tax gains from Asset Sales or abandonments or reserves  relating  thereto,
(b) after-tax items classified as  extraordinary or nonrecurring  gains, (c) the
net  income of any  Person  acquired  in a "pooling  of  interests"  transaction
accrued  prior to the date it becomes a  Restricted  Subsidiary  or is merged or
consolidated with the Company or any Restricted  Subsidiary,  (d) the net income
(but not loss) of any Restricted  Subsidiary to the extent that the  declaration
of dividends or similar  distributions  by that  Restricted  Subsidiary  of that
income is restricted by charter,  contract,  operation of law or otherwise,  (e)
the net income of any Person in which the Company has an interest,  other than a
Restricted  Subsidiary,  except to the extent of cash dividends or distributions
actually paid to the Company or to a Restricted  Subsidiary by such Person,  (f)
income or loss  attributable  to  discontinued  operations  (including,  without
limitation,  operations  disposed  of during  such  period  whether  or not such
operations were classified as  discontinued)  and (g) in the case of a successor
to the Company by  consolidation  or merger or as a transferee  of the Company's
assets,  any net income  (or loss) of the  successor  corporation  prior to such
consolidation, merger or transfer of assets.

         "Consolidated  Net  Worth"  of any  Person  as of any  date  means  the
consolidated  stockholders' equity of such Person,  determined on a consolidated
basis in accordance with GAAP, less (without  duplication)  amounts attributable
to Disqualified Capital Stock of such Person.

         "Consolidated Non-Cash Charges" means, with respect to the Company, for
any  period,  the  aggregate  depreciation,  depletion,  amortization  and other
non-cash  expenses  of the  Company  and its  Restricted  Subsidiaries  reducing
Consolidated  Net  Income  of the  Company  for  such  period,  determined  on a
consolidated   basis  in  accordance  with  GAAP  (excluding  any  such  charges
constituting an extraordinary  item or loss or any such charge which requires an
accrual of or a reserve for cash charges for any future period).

         "Consolidation" means, with respect to any Person, the consolidation of
the accounts of the  Restricted  Subsidiaries  of such Person with those of such

                                       8


Person, all in accordance with GAAP;  provided,  however,  that  "consolidation"
will not include consolidation of the accounts of any Unrestricted Subsidiary of
such Person with the  accounts of such  Person.  The term  "consolidated"  has a
correlative meaning to the foregoing.

         "Corporate  Trust  Office"  means the office of the Trustee at which at
any  particular   time  its  corporate   trust  business  shall  be  principally
administered, which office at the date of execution of this Indenture is located
at One State Street, Eleventh Floor, New York, New York 10004.

         "Covenant Defeasance" has the meaning set forth in Section 8.01.

         "Credit Facility" means the Amended and Restated Credit Agreement dated
as of November 14, 1996, by and among the Company, Bankers Trust Company and ING
Capital,  as Co-Agents,  and each of the lenders named therein, or any successor
or replacement  agreement and whether by the same or any other agent,  lender or
group of  lenders,  together  with the  related  documents  thereto  (including,
without limitation,  any guarantee agreements and security  documents),  in each
case as such agreements have been or may be amended (including any amendment and
restatement  thereof),  supplemented  or otherwise  modified  from time to time,
including  any  agreements  extending the maturity of,  refinancing,  replacing,
increasing  or otherwise  restructuring  all or any portion of the  Indebtedness
under such agreements.

         "Crude  Oil and  Natural  Gas  Business"  means  (i)  the  acquisition,
exploration, development, operation and disposition of interests in oil, gas and
other hydrocarbon  properties located in North America,  and (ii) the gathering,
marketing,  treating,  processing,  storage,  selling  and  transporting  of any
production from such interests or properties of the Company or of others.

         "Crude Oil and Natural Gas Hedge Agreements" means, with respect to any
Person,  any oil and gas agreements and other  agreements or arrangements or any
combination  thereof  entered  into by such  Person  in the  ordinary  course of
business and that is designed to provide  protection against oil and natural gas
price fluctuations.

         "Crude Oil and Natural Gas Properties" means all Properties,  including
equity or other ownership interests therein, owned by any Person which have been
assigned "proved oil and gas reserves" as defined in Rule 4-10 of Regulation S-X
of the Securities Act as in effect on the Issue Date.

         "Crude Oil and Natural  Gas Related  Assets"  means any  Investment  or
capital   expenditure  (but  not  including  additions  to  working  capital  or
repayments of any revolving credit or working capital borrowings) by the Company
or any Subsidiary of the Company which is related to the business of the Company
and its  Subsidiaries  as it is  conducted  on the date of the Asset Sale giving
rise to the Net Cash Proceeds to be reinvested.

                                       9


         "Currency Agreement" means any foreign exchange contract, currency swap
agreement  or other  similar  agreement or  arrangement  designed to protect the
Company or any  Restricted  Subsidiary of the Company  against  fluctuations  in
currency values.

         "Custodian"  means  any  receiver,   trustee,   assignee,   liquidator,
sequestrator or similar official under any Bankruptcy Law.
         "Default"  means an event or condition  the  occurrence of which is, or
with the lapse of time or the  giving  of  notice or both  would be, an Event of
Default.

         "Depository"  means The  Depository  Trust  Company,  its  nominees and
successors.

         "Disqualified  Capital  Stock" means that portion of any Capital  Stock
which,  by  its  terms  (or by  the  terms  of any  security  into  which  it is
convertible  or for  which it is  exchangeable),  or upon the  happening  of any
event,  matures  or  is  mandatorily  redeemable,  pursuant  to a  sinking  fund
obligation or otherwise,  or is mandatorily redeemable at the sole option of the
holder  thereof,  in whole or in part,  in either case, on or prior to the final
maturity of the Notes.

         "Equity  Offering" means an offering of Qualified  Capital Stock of the
Company.

         "Event of Default" has the meaning provided in Section 6.01.

         "Exchange Act" means the  Securities  Exchange Act of 1934, as amended,
or any successor statute or statutes thereto.

         "Exchange  Notes"  means the  Issuers'  11 1/2%  Senior  Notes due 2004
Series D issued in exchange for the Initial Notes  pursuant to the  Registration
Rights Agreement and shall also include any Additional Series D Notes.

         "fair market value" means,  with respect to any asset or property,  the
price which could be negotiated in an arm's-length, free market transaction, for
cash,  between an informed and willing seller and an informed and willing buyer,
neither  of  whom  is  under  undue  pressure  or  compulsion  to  complete  the
transaction.  Fair market value shall be determined by the Board of Directors of
the Company  acting  reasonably  and in good faith and shall be  evidenced  by a
Board  Resolution of the Company  delivered to the Trustee;  provided,  however,
that (A) if the aggregate  non-cash  consideration to be received by the Company
or any Restricted Subsidiary from any Asset Sale shall reasonably be expected to
exceed  $5,000,000  or (B) if the net worth of any  Restricted  Subsidiary to be
designated as an Unrestricted  Subsidiary shall reasonably be expected to exceed
$10,000,000,  then fair  market  value  shall be  determined  by an  Independent
Advisor.

                                       10


         "GAAP" means generally accepted accounting  principles set forth in the
opinions and  pronouncements of the Accounting  Principles Board of the American
Institute of Certified Public  Accountants and statements and  pronouncements of
the Financial Accounting Standards Board as of any date of determination.

         "Global Note" has the meaning provided in Section 2.01.

         "guarantee"  means any  obligation,  contingent  or  otherwise,  of any
Person directly or indirectly  guaranteeing any Indebtedness or other obligation
of any other Person and, without  limiting the generality of the foregoing,  any
obligation,  direct or indirect,  contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Indebtedness or other obligation of such other Person (whether arising by virtue
of partnership  arrangements,  or by agreement to keep-well, to purchase assets,
goods,  securities  or  services,  to  take-or-pay,  or  to  maintain  financial
statement conditions or otherwise) or (ii) entered into for purposes of assuring
in any other manner the obligee of such  Indebtedness or other obligation of the
payment  thereof or to protect such obligee  against loss in respect thereof (in
whole  or in part)  (but if in  part,  only to the  extent  thereof);  provided,
however,  that the term  "guarantee"  shall not  include  (A)  endorsements  for
collection  or deposit in the  ordinary  course of business  and (B)  guarantees
(other than guarantees of  Indebtedness)  by the Company in respect of assisting
one or more Subsidiaries in the ordinary course of their respective  businesses,
including  without  limitation  guarantees  of trade  obligations  and operating
leases,  on ordinary  business terms.  The term "guarantee" used as a verb has a
corresponding meaning.

         "Guarantees"  means  the  guarantees  of  the  obligations  under  this
Indenture  and the Notes by the  Subsidiary  Guarantors  as set forth in Article
Eleven hereof.

         "Holder" means any Person holding a Note.

         "Hydrocarbons"  means oil, gas, casinghead gas, drip gasoline,  natural
gasoline, condensate,  distillate, liquid hydrocarbons, gaseous hydrocarbons and
all  constituents,   elements  or  compounds  thereof  and  products   processed
therefrom.

         "incur" has the meaning set forth in Section 4.12.

         "Indebtedness"  means with respect to any Person,  without duplication,
(a) all  Obligations of such Person for borrowed  money,  (b) all Obligations of
such Person evidenced by bonds, debentures,  notes or other similar instruments,
(c) all  Capitalized  Lease  Obligations of such Person,  (d) all Obligations of
such Person issued or assumed as the deferred  purchase  price of property,  all
conditional  sale  obligations  and all  Obligations  under any title  retention
agreement (but excluding  trade accounts  payable),  (e) all Obligations for the
reimbursement  of any  obligor on a letter of  credit,  banker's  acceptance  or
similar credit transaction,  (f) guarantees and other contingent  obligations in
respect of Indebtedness  referred to in clauses (a) through (e) above and clause

                                       11


(h) below,  (g) all  Obligations  of any other Person of the type referred to in
clauses (a)  through (f) above which are secured by any Lien on any  property or
asset of such  Person,  the  amount of such  Obligation  being  deemed to be the
lesser of the fair market  value of such  property or asset or the amount of the
Obligation  so  secured,  (h) all  Obligations  under  Currency  Agreements  and
Interest Swap Obligations and (i) all Disqualified  Capital Stock issued by such
Person with the amount of Indebtedness  represented by such Disqualified Capital
Stock being equal to the greater of its  voluntary  or  involuntary  liquidation
preference  and its maximum  fixed  Redemption  Price or repurchase  price.  For
purposes  hereof,  the  "maximum  fixed  repurchase  price" of any  Disqualified
Capital Stock which does not have a fixed  repurchase  price shall be calculated
in  accordance  with the  terms of such  Disqualified  Capital  Stock as if such
Disqualified  Capital  Stock were  purchased  on any date on which  Indebtedness
shall be required to be determined pursuant to this Indenture, and if such price
is based  upon,  or  measured  by, the fair  market  value of such  Disqualified
Capital Stock, such fair market value shall be determined reasonably and in good
faith by the Board of  Directors  of the  Company.  The  "amount" or  "principal
amount" of Indebtedness at any time of determination as used herein  represented
by (a) any Indebtedness issued at a price that is less than the principal amount
at  maturity  thereof  shall be the face  amount  of the  liability  in  respect
thereof,  (b) any Capitalized Lease Obligation shall be the amount determined in
accordance  with the  definition  thereof,  (c) any  Interest  Swap  Obligations
included in the  definition  of Permitted  Indebtedness  shall be zero,  (d) all
other  unconditional  obligations  shall be the amount of the liability  thereof
determined  in  accordance  with GAAP and (e) all other  contingent  obligations
shall be the maximum liability at such date of such Person.

         "Indenture" means this Indenture,  as amended or supplemented from time
to time in accordance with the terms hereof.

         "Independent  Advisor"  means  a  reputable  accounting,  appraisal  or
nationally  recognized  investment  banking,  engineering or consulting firm (a)
which does not, and whose  directors,  officers and  employees or  Affiliates do
not, have a direct or indirect  material  financial  interest in the Company and
(b)  which,  in the  judgment  of the  Board of  Directors  of the  Company,  is
otherwise disinterested, independent and qualified to perform the task for which
it is to be engaged.

         "Initial  Notes"  means the  Company's  11 1/2%  Senior  Notes due 2004
Series C issued pursuant to this Indenture.

         "Initial Purchaser" means Jefferies & Company, Inc.

         "Institutional  Accredited  Investor"  means an institution  that is an
"accredited investor" as that term is defined in Rule 501(a)(1), (2), (3) or (7)
under the Securities Act.

         "interest,"  when used with respect to any Note means the amount of all

                                       12


interest  accruing on such Note,  including any  applicable  defaulted  interest
pursuant  to  Section  2.12  and  any  Additional   Interest   pursuant  to  the
Registration Rights Agreement.

         "Interest  Payment Date" means the stated maturity of an installment of
interest on the Notes.

         "Interest  Swap  Obligations"  means  the  obligations  of  any  Person
pursuant  to any  arrangement  with  any  other  Person,  whereby,  directly  or
indirectly,  such  Person is  entitled  to  receive  from time to time  periodic
payments calculated by applying either a floating or a fixed rate of interest on
a stated notional  amount in exchange for periodic  payments made by such Person
calculated  by  applying  a fixed or a  floating  rate of  interest  on the same
notional  amount and shall  include,  without  limitation,  interest rate swaps,
caps, floors, collars and similar agreements.

         "Internal  Revenue  Code" means the Internal  Revenue Code of 1986,  as
amended to the date hereof and from time to time hereafter.

         "Investment"  means, with respect to any Person, any direct or indirect
(i) loan, advance or other extension of credit (including, without limitation, a
guarantee) or capital contribution to (by means of any transfer of cash or other
property  (valued at the fair market  value  thereof as of the date of transfer)
others or any  payment  for  property  or  services  for the  account  or use of
others),  (ii)  purchase or  acquisition  by such  Person of any Capital  Stock,
bonds, notes, debentures or other securities or evidences of Indebtedness issued
by, any Person (whether by merger, consolidation,  amalgamation or otherwise and
whether  or not  purchased  directly  from  the  issuer  of such  securities  or
evidences of Indebtedness), (iii) guarantee or assumption of the Indebtedness of
any other Person (other than the guarantee or assumption of Indebtedness of such
Person or a Restricted  Subsidiary of such Person which  guarantee or assumption
is made in compliance with the provisions of Section 4.12), and (iv) other items
that  would be  classified  as  investments  on a balance  sheet of such  Person
prepared in accordance with GAAP.  Notwithstanding  the foregoing,  "Investment"
shall  exclude  extensions  of trade  credit by the Company  and its  Restricted
Subsidiaries  on commercially  reasonable  terms in accordance with normal trade
practices of the Company or such Restricted Subsidiary,  as the case may be. The
amount of any  Investment  shall not be adjusted  for  increases or decreases in
value, or write-ups,  write-downs or write-offs with respect to such Investment.
If the Company or any Restricted  Subsidiary sells or otherwise  disposes of any
Capital Stock of any Restricted Subsidiary such that, after giving effect to any
such sale or  disposition,  it ceases to be a  Subsidiary  of the  Company,  the
Company  shall be deemed to have made an Investment on the date of any such sale
or  disposition  equal to the fair  market  value of the  Capital  Stock of such
Restricted Subsidiary not sold or disposed of.

         "Issue Date" means the date of original issuance of the Initial Notes.

         "Issuers" means the Company and Canadian Abraxas.

                                       13


         "Legal Defeasance" has the meaning set forth in Section 8.01.

         "Legal Holiday" has the meaning provided in Section 10.07.

         "Lien"  means  any lien,  mortgage,  deed of  trust,  pledge,  security
interest,  charge or encumbrance of any kind (including any conditional  sale or
other  title  retention  agreement,  any  lease in the  nature  thereof  and any
agreement to give any security interest).

         "Material Change" means an increase or decrease of more than 10% during
a fiscal quarter in the discounted future net cash flows (excluding changes that
result  solely from  changes in prices)  from proved oil and gas reserves of the
Company and consolidated  Subsidiaries (before any state or federal income tax);
provided,  however, that the following will be excluded from the Material Change
calculation:  (i) any  acquisitions  during the quarter of oil and gas  reserves
that have been  estimated  by  independent  petroleum  engineers  and on which a
report or reports  exist,  (ii) any  disposition  of properties  existing at the
beginning of such quarter that have been disposed of as provided in Section 4.16
and (iii) any reserves added during the quarter  attributable to the drilling or
recompletion of wells not included in previous reserve estimates, but which will
be included in future quarters.

         "Maturity Date" means November 1, 2004.

         "Moody's" means Moody's Investors Service, Inc. and its successors.

         "Net Cash Proceeds" means, with respect to any Asset Sale, the proceeds
in the  form of cash  or Cash  Equivalents  including  payments  in  respect  of
deferred  payment  obligations  when  received  in the  form  of  cash  or  Cash
Equivalents  received by the Company or any of its Restricted  Subsidiaries from
such Asset Sale net of (a) reasonable  out-of-pocket  expenses and fees relating
to such  Asset  Sale  (including,  without  limitation,  legal,  accounting  and
investment banking fees and sales commissions),  (b) taxes paid or payable after
taking into account any reduction in consolidated tax liability due to available
tax credits or  deductions  and any tax sharing  arrangements,  (c) repayment of
Indebtedness  that is required to be repaid in  connection  with such Asset Sale
and (d) appropriate  amounts  (determined by the Chief Financial  Officer of the
Company) to be provided by the Company or any Restricted Subsidiary, as the case
may be,  as a  reserve,  in  accordance  with  GAAP,  against  any  post-closing
adjustments or liabilities  associated  with such Asset Sale and retained by the
Company or any Restricted Subsidiary, as the case may be, after such Asset Sale,
including,  without  limitation,   pension  and  other  post-employment  benefit
liabilities,  liabilities related to environmental matters and liabilities under
any indemnification  obligations  associated with such Asset Sale (but excluding
any payments  which, by the terms of the  indemnities,  will not, be made during
the term of the Notes).

                                       14


         "Net Proceeds Offer" has the meaning set forth in Section 4.16.

         "Net  Proceeds  Offer  Adjustment  Ratio" has the  meaning set forth in
Section 4.16.

         "Net Proceeds Offer Amount" has the meaning set forth in Section 4.16.

         "Net Proceeds  Offer Payment Date" has the meaning set forth in Section
4.16.

         "Net Proceeds  Offer Trigger Date" has the meaning set forth in Section
4.16.

         "Net Working  Capital"  means (i) all current assets of the Company and
its consolidated Subsidiaries, minus (ii) all current liabilities of the Company
and its  consolidated  Subsidiaries,  except  current  liabilities  included  in
Indebtedness,  in each case as set forth in financial  statements of the Company
prepared in accordance with GAAP.

         "Non-Recourse   Indebtedness"   with   respect  to  any  Person   means
Indebtedness of such Person for which (i) the sole legal recourse for collection
of principal and interest on such  Indebtedness is against the specific property
identified in the instruments  evidencing or securing such Indebtedness and such
property  was  acquired  with  the  proceeds  of  such   Indebtedness   or  such
Indebtedness  was Incurred within 90 days after the acquisition of such property
and (ii) no other assets of such Person may be realized  upon in  collection  of
principal or interest on such  Indebtedness;  provided,  however,  that any such
Indebtedness  shall  not  cease to be  "Non-Recourse  Indebtedness"  solely as a
result of the instrument  governing such Indebtedness  containing terms pursuant
to which such Indebtedness  becomes recourse upon (a) fraud or misrepresentation
by the Person in connection with such  Indebtedness,  (b) such Person failing to
pay taxes or other  charges  that result in the creation of liens on any portion
of the specific  property  securing such Indebtedness or failing to maintain any
insurance  on  such  property  required  under  the  instruments  securing  such
Indebtedness, (c) the conversion of any of the collateral for such Indebtedness,
(d) such Person failing to maintain any of the collateral for such  Indebtedness
in the condition required under the instruments  securing the Indebtedness,  (e)
any income generated by the specific property  securing such Indebtedness  being
applied  in a manner not  otherwise  allowed in the  instruments  securing  such
Indebtedness,  (f) the violation of any  applicable  law or ordinance  governing
hazardous  materials or  substances  or otherwise  affecting  the  environmental
condition of the specific  property  securing the Indebtedness or (g) the rights
of the  holder of such  Indebtedness  to the  specific  property  are  impaired,
suspended or reduced by any act, omission or  misrepresentation  of such Person;
provided,  further,  however,  that upon the  occurrence of any of the foregoing
clauses (a) through (g) above, any such Indebtedness  which shall have ceased to
be  "Non-Recourse  Indebtedness"  shall  be  deemed  to have  been  Indebtedness
incurred by such Person at such time.

                                       15


         "Non-U.S.  Person" means a person who is not a U.S. person,  as defined
in Regulation S.

         "Notes" means the Initial Notes and the Exchange  Notes  (including any
Additional  Series D Notes) treated as a single class of securities,  as amended
or supplemented from time to time in accordance with the terms hereof,  that are
issued pursuant to this Indenture.

         "Obligations" means all obligations for principal,  premium,  interest,
penalties, fees, indemnifications, reimbursements, damages and other liabilities
payable under the documentation governing any Indebtedness.

         "Offering  Memorandum" means the confidential Offering Memorandum dated
January 20, 1998 of the Issuers relating to the offering of the Notes.

         "Officer" means, with respect to any Person,  the Chairman of the Board
of Directors,  the Chief Executive Officer,  the President,  any Vice President,
the Chief Financial Officer, the Treasurer, the Controller,  or the Secretary of
such Person,  or any other officer  designated by the Board of Directors serving
in a similar capacity.

         "Officers'  Certificate"  means a certificate signed by two Officers of
each of the Issuers.

         "Opinion of Counsel" means a written  opinion from legal counsel who is
reasonably acceptable to the Trustee complying with the requirements of Sections
10.04 and 10.05, as they relate to the giving of an Opinion of Counsel.

         "Paying Agent" has the meaning provided in Section 2.03.

         "Payment Restriction" shall have the meaning set forth in Section 4.13.

         "Permitted  Indebtedness"  means,  without  duplication,  each  of  the
following:

                  (a)  Indebtedness  under the Notes,  the Exchange  Notes,  the
         Private Exchange Notes, if any, this Indenture and the Guarantees,  the
         Series A/B Notes, the Series A/B Indenture and any guarantees  relating
         to the Series A/B Notes;

                  (b) Indebtedness  incurred  pursuant to the Credit Facility in
         an aggregate  principal  amount at any time  outstanding  not to exceed
         $50,000,000,  reduced by any required  permanent  repayments (which are
         accompanied  by  a  corresponding   permanent   commitment   reduction)
         thereunder;

                  (c) Interest Swap  Obligations  of the Company or a Restricted
         Subsidiary  covering   Indebtedness  of  the  Company  or  any  of  its

                                       16


         Restricted  Subsidiaries;  provided,  however,  that such Interest Swap
         Obligations  are entered into to protect the Company and its Restricted
         Subsidiaries  from  fluctuations  in  interest  rates  on  Indebtedness
         incurred in accordance  with this  Indenture to the extent the notional
         principal  amount of such Interest Swap Obligations does not exceed the
         principal  amount  of the  Indebtedness  to which  such  Interest  Swap
         Obligation relates;

                  (d) Indebtedness of a Restricted  Subsidiary to the Company or
         to  a  Wholly  Owned   Restricted   Subsidiary  for  so  long  as  such
         Indebtedness  is held  by the  Company  or a  Wholly  Owned  Restricted
         Subsidiary, in each case subject to no Lien held by a Person other than
         the Company or a Wholly Owned Restricted Subsidiary; provided, however,
         that if as of any date any Person  other  than the  Company or a Wholly
         Owned  Restricted  Subsidiary  owns or holds any such  Indebtedness  or
         holds a Lien in respect of such Indebtedness, such date shall be deemed
         the incurrence of Indebtedness not constituting  Permitted Indebtedness
         by the issuer of such Indebtedness;

                  (e)  Indebtedness of the Company to a Wholly Owned  Restricted
         Subsidiary for so long as such  Indebtedness  is held by a Wholly Owned
         Restricted  Subsidiary,  in each  case  subject  to no Lien;  provided,
         however,  that (i) any  Indebtedness of the Company to any Wholly Owned
         Restricted  Subsidiary that is not a Subsidiary  Guarantor is unsecured
         and  subordinated,  pursuant to a written  agreement,  to the Company's
         obligations  under  the  Indenture  and the Notes and (ii) if as of any
         date any Person other than a Wholly Owned Restricted Subsidiary owns or
         holds  any  such  Indebtedness  or  holds  a Lien  in  respect  of such
         Indebtedness,  such date shall be deemed the incurrence of Indebtedness
         not constituting Permitted Indebtedness by the Company;

                  (f) Indebtedness  arising from the honoring by a bank or other
         financial   institution  of  a  check,   draft  or  similar  instrument
         inadvertently (except in the case of daylight overdrafts) drawn against
         insufficient  funds  in the  ordinary  course  of  business;  provided,
         however,  that such  Indebtedness is  extinguished  within two Business
         Days of incurrence;
                  (g)  Indebtedness  of the  Company  or  any of its  Restricted
         Subsidiaries  represented  by letters of credit for the  account of the
         Company or such Restricted Subsidiary,  as the case may be, in order to
         provide security for workers' compensation claims,  payment obligations
         in  connection  with  self-insurance  or  similar  requirements  in the
         ordinary course of business;

                  (h)      Refinancing Indebtedness;

                  (i) Capitalized Lease  Obligations of the Company  outstanding

                                       17


         on the Series A/B Issue Date;

                  (j)   Capitalized   Lease   Obligations   and  Purchase  Money
         Indebtedness of the Company or any of its Restricted  Subsidiaries  not
         to exceed $5,000,000 at any one time outstanding;

                  (k)      Permitted Operating Obligations;

                  (l)  Obligations  arising  in  connection  with  Crude Oil and
         Natural Gas Hedge Agreements of the Company or a Restricted Subsidiary;

                  (m)      Non-Recourse Indebtedness;

                  (n) Indebtedness under Currency Agreements; provided, however,
         that in the case of Currency  Agreements  which relate to Indebtedness,
         such  Currency  Agreements  do not  increase  the  Indebtedness  of the
         Company and its  Restricted  Subsidiaries  outstanding  other than as a
         result of fluctuations in foreign currency  exchange rates or by reason
         of fees, indemnities and compensation payable thereunder;

                  (o)  additional  Indebtedness  of  the  Company  or any of its
         Restricted  Subsidiaries in an aggregate  principal  amount at any time
         outstanding not to exceed the greater of (i) $10.0 million or (ii) 5.0%
         of Adjusted Consolidated Net Tangible Assets of the Company; and

                  (p) Indebtedness outstanding on the Series A/B Issue Date.

         "Permitted  Industry   Investments"  means  (i)  capital  expenditures,
including, without limitation,  acquisitions of Company Properties and interests
therein;  (ii) (a) entry into  operating  agreements,  joint  ventures,  working
interests,  royalty interests,  mineral leases, unitization agreements,  pooling
arrangements or other similar or customary agreements, transactions, properties,
interests or  arrangements,  and  Investments  and  expenditures  in  connection
therewith or pursuant thereto, in each case made or entered into in the ordinary
course of the oil and gas business,  and (b) exchanges of Company Properties for
other  Company  Properties  of at least  equivalent  value as determined in good
faith by the  Board of  Directors  of the  Company;  and  (iii)  Investments  of
operating  funds on behalf of co-owners of Crude Oil and Natural Gas  Properties
of the Company or the Subsidiaries pursuant to joint operating agreements.

         "Permitted  Investments"  means (a)  Investments  by the Company or any
Restricted  Subsidiary  in any Person that is or will become  immediately  after
such Investment a Restricted  Subsidiary or that will merge or consolidate  into
the  Company or a  Restricted  Subsidiary  that is not  subject  to any  Payment
Restriction,  (b)  Investments  in the  Company  by any  Restricted  Subsidiary;
provided,  however, that any Indebtedness evidencing any such Investment held by
a  Restricted  Subsidiary  that is not a Subsidiary  Guarantor is unsecured  and
subordinated,  pursuant to a written  agreement,  to the  Company's  obligations

                                       18


under  the  Notes  and  this  Indenture;   (c)  investments  in  cash  and  Cash
Equivalents;  (d) Investments made by the Company or its Restricted Subsidiaries
as a result of  consideration  received in connection with an Asset Sale made in
compliance with Section 4.16; and (e) Permitted Industry Investments.

         "Permitted Liens" means each of the following types of Liens:

                  (a) Liens  existing  as of the  Series  A/B Issue  Date to the
         extent  and in the  manner  such  Liens are in effect on the Series A/B
         Issue  Date  (and any  extensions,  replacements  or  renewals  thereof
         covering  property  or assets  secured  by such Liens on the Series A/B
         Issue Date);

                  (b) Liens securing  Indebtedness  outstanding under the Credit
         Facility  and Liens  arising  under the  Indenture  or the  Series  A/B
         Indenture;

                  (c)      Liens securing the Notes and the Guarantees;

                  (d) Liens of the Company or a Restricted  Subsidiary on assets
         of any Restricted Subsidiary;

                  (e) Liens securing Refinancing  Indebtedness which is incurred
         to  Refinance  any  Indebtedness  which  has  been  secured  by a  Lien
         permitted   under  this  Indenture  and  which  has  been  incurred  in
         accordance  with the provisions of this Indenture;  provided,  however,
         that such Liens (x) are no less  favorable  to the  Holders and are not
         more favorable to the  lienholders  with respect to such Liens than the
         Liens in respect of the  Indebtedness  being  Refinanced and (y) do not
         extend to or cover any  property or assets of the Company or any of its
         Restricted Subsidiaries not securing the Indebtedness so Refinanced;

                  (f) Liens for taxes,  assessments or  governmental  charges or
         claims  either (i) not  delinquent  or (ii)  contested in good faith by
         appropriate  proceedings  and as to which the  Company or a  Restricted
         Subsidiary,  as the case may be, shall have set aside on its books such
         reserves as may be required pursuant to GAAP;

                  (g)  statutory  and  contractual  Liens of landlords to secure
         rent  arising in the  ordinary  course of  business  to the extent such
         Liens  relate  only to the  tangible  property  of the lessee  which is
         located  on  such   property  and  Liens  of  carriers,   warehousemen,
         mechanics, suppliers, materialmen, repairmen and other Liens imposed by
         law  incurred  in the  ordinary  course  of  business  for sums not yet
         delinquent or being  contested in good faith,  if such reserve or other
         appropriate provision,  if any, as shall be required by GAAP shall have
         been made in respect thereof;

                  (h) Liens incurred or deposits made in the ordinary  course of

                                       19


         business (i) in  connection  with workers'  compensation,  unemployment
         insurance  and  other  types of  social  security,  including  any Lien
         securing  letters of credit  issued in the ordinary  course of business
         consistent  with past  practice  in  connection  therewith,  or (ii) to
         secure the performance of tenders,  statutory  obligations,  surety and
         appeal bonds,  bids,  leases,  government  contracts,  performance  and
         return-of-money  bonds  and other  similar  obligations  (exclusive  of
         obligations for the payment of borrowed money);

                  (i) judgment and attachment  Liens not giving rise to an Event
         of Default;

                  (j) easements, rights-of-way, zoning restrictions, restrictive
         covenants,  minor  imperfections  in title and other similar charges or
         encumbrances  in  respect  of  real  property  not  interfering  in any
         material  respect  with the  ordinary  conduct of the  business  of the
         Company or any of its Restricted Subsidiaries;

                  (k) any  interest or title of a lessor  under any  Capitalized
         Lease  Obligation;  provided  that  such  Liens  do not  extend  to any
         property  or  assets  which  is not  leased  property  subject  to such
         Capitalized Lease Obligation;

                  (l) Liens securing Purchase Money  Indebtedness of the Company
         or any Restricted Subsidiary;  provided, however, that (i) the Purchase
         Money  Indebtedness  shall not be secured by any  property or assets of
         the Company or any  Restricted  Subsidiary  other than the property and
         assets so  acquired  or  constructed  and (ii) the Lien  securing  such
         Indebtedness  shall be created  within 90 days of such  acquisition  or
         construction;

                  (m) Liens securing  reimbursement  obligations with respect to
         commercial  letters  of  credit  which  encumber  documents  and  other
         property  relating to such  letters of credit and products and proceeds
         thereof;

                  (n) Liens  encumbering  deposits  made to  secure  obligations
         arising   from   statutory,   regulatory,   contractual,   or  warranty
         requirements  of the  Company  or any of its  Restricted  Subsidiaries,
         including rights of offset and set-off;

                  (o) Liens securing  Interest Swap  Obligations  which Interest
         Swap  Obligations  relate to Indebtedness  that is otherwise  permitted
         under this Indenture and Liens securing Crude Oil and Natural Gas Hedge
         Agreements;

                  (p)  Liens   securing   Acquired   Indebtedness   incurred  in
         accordance with Section 4.12;  provided,  however,  that (i) such Liens
         secured  such  Acquired  Indebtedness  at the time of and  prior to the
         incurrence of such Acquired Indebtedness by the Company or a Restricted
         Subsidiary and were not granted in connection  with, or in anticipation
         of, the  incurrence of such Acquired  Indebtedness  by the Company or a
         Restricted Subsidiary and (ii) such Liens do not extend to or cover any

                                       20


         property  or  assets  of  the  Company  or of  any  of  its  Restricted
         Subsidiaries  other  than the  property  or  assets  that  secured  the
         Acquired  Indebtedness  prior  to the  time  such  Indebtedness  became
         Acquired Indebtedness of the Company or a Restricted Subsidiary and are
         no more favorable to the  lienholders  than those securing the Acquired
         Indebtedness  prior to the incurrence of such Acquired  Indebtedness by
         the Company or a Restricted Subsidiary;

                  (q) Liens on, or  related  to,  properties  and  assets of the
         Company  and its  Subsidiaries  to  secure  all or a part of the  costs
         incurred in the ordinary course of business of  exploration,  drilling,
         development,  production,  processing,  transportation,   marketing  or
         storage, or operation thereof;

                  (r) Liens on pipeline or pipeline facilities,  Hydrocarbons or
         properties and assets of the Company and its  Subsidiaries  which arise
         out of operation of law;

                  (s) royalties,  overriding royalties,  revenue interests,  net
         revenue  interests,   net  profit  interests,   revisionary  interests,
         production payments,  production sales contracts,  operating agreements
         and other similar interests,  properties,  arrangements and agreements,
         all as ordinarily  exist with respect to  Properties  and assets of the
         Company and its  Subsidiaries  or otherwise as are customary in the oil
         and gas business;

                  (t) with respect to any  Properties  and assets of the Company
         and its  Subsidiaries,  Liens arising under, or in connection  with, or
         related to, farm-out, farm-in, joint operation, area of mutual interest
         agreements and/or other similar or customary  arrangements,  agreements
         or  interests  that the Company or any  Subsidiary  determines  in good
         faith to be necessary for the economic development of such Property;

                  (u) any (a) interest or title of a lessor or  sublessor  under
         any lease, (b) restriction or encumbrance that the interest or title of
         such  lessor  or  sublessor  may  be  subject  to  (including,  without
         limitation,  ground  leases  or  other  prior  leases  of  the  demised
         premises,  mortgages,  mechanics' liens, tax liens, and easements),  or
         (c) subordination of the interest of the lessee or sublessee under such
         lease to any  restrictions or encumbrance  referred to in the preceding
         clause (b);

                  (v) Liens in favor of collecting or payor banks having a right
         of setoff,  revocation,  refund or chargeback  with respect to money or
         instruments of the Company or any Restricted Subsidiary on deposit with
         or in possession of such bank; and

                  (w)      Liens securing Non-recourse Indebtedness.

                                       21




         "Permitted Operating  Obligations" means Indebtedness of the Company or
any Restricted  Subsidiary in respect of one or more standby  letters of credit,
bid, performance or surety bonds, or other reimbursement obligations, issued for
the account of, or entered into by, the Company or any Restricted  Subsidiary in
the ordinary course of business  (excluding  obligations related to the purchase
by the  Company  or any  Restricted  Subsidiary  of  Hydrocarbons  for which the
Company or such Restricted  Subsidiary has contracts to sell), or in lieu of any
thereof  or in  addition  to any  thereto,  guarantees  and  letters  of  credit
supporting any such  obligations and  Indebtedness (in each case, other than for
an obligation for borrowed money,  other than borrowed money  represented by any
such  letter of  credit,  bid,  performance  or surety  bond,  or  reimbursement
obligation itself, or any guarantee and letter of credit related thereto).

         "Person" means an individual, partnership, corporation,  unincorporated
organization,  limited liability company,  trust,  estate or joint venture, or a
governmental agency or political subdivision thereof.
         "Physical Notes" has the meaning provided in Section 2.01.

         "Plan  of  Liquidation"  means,  with  respect  to any  Person,  a plan
(including  by  operation  of  law)  that  provides  for,  contemplates  or  the
effectuation   of  which  is  preceded  or   accompanied   by  (whether  or  not
substantially  contemporaneously)  (i) the  sale,  lease,  conveyance  or  other
disposition of all or  substantially  all of the assets of such Person otherwise
than as an entirety or substantially as an entirety and (ii) the distribution of
all or  substantially  all of the proceeds of such sale,  lease,  conveyance  or
other  disposition and all or substantially  all of the remaining assets of such
Person to holders of Capital Stock of such Person.

         "Preferred  Stock" of any Person means any Capital Stock of such Person
that has  preferential  rights to any other  Capital  Stock of such  Person with
respect to dividends or redemptions or upon liquidation.

         "principal"  of  any  Indebtedness  (including  the  Notes)  means  the
principal  amount  of such  Indebtedness  plus  the  premium,  if  any,  on such
Indebtedness.

         "Private  Exchange Notes" has the meaning set forth in the Registration
Rights Agreement.

         "Private  Placement Legend" means the legend initially set forth on the
Notes in the form set forth in Section 2.15.

         "pro forma" means,  with respect to any calculation made or required to
be made pursuant to the terms of this  Indenture,  a  calculation  in accordance
with Article 11 of Regulation S-X under the Securities Act, as determined by the
Board of Directors of the Company in consultation  with its  independent  public
accountants.

                                       22


         "Property"  means,  with respect to any Person,  any  interests of such
Person in any kind of property or asset,  whether  real,  personal or mixed,  or
tangible  or  intangible,   including,   without   limitation,   Capital  Stock,
partnership  interests  and other  equity or  ownership  interests  in any other
Person.

         "Purchase Money  Indebtedness"  means  Indebtedness the net proceeds of
which are used to  finance  the cost  (including  the cost of  construction)  of
property  or assets  acquired  in the normal  course of  business  by the Person
incurring such Indebtedness.

         "Qualified   Capital  Stock"  means  any  Capital  Stock  that  is  not
Disqualified Capital Stock.

         "Qualified  Institutional  Buyer"  or  "QIB"  shall  have  the  meaning
specified in Rule 144A under the Securities Act.

         "Record Date" means the Record Dates specified in the Notes.

         "Redemption  Date," when used with  respect to any Note to be redeemed,
means the date fixed for such  redemption  pursuant  to this  Indenture  and the
Notes.

         "Redemption  Price," when used with respect to any Note to be redeemed,
means the price fixed for such redemption,  including  principal and premium, if
any, pursuant to this Indenture and the Notes.

         "Reference Date" has the meaning set forth in Section 4.10.

         "Refinance"  means,  in respect of any  security  or  Indebtedness,  to
refinance,  extend, renew, refund, repay, prepay,  redeem, defease or retire, or
to issue a security  or  Indebtedness  in  exchange  or  replacement  for,  such
security or Indebtedness  in whole or in part;  "Refinanced"  and  "Refinancing"
shall have correlative meanings.

         "Refinancing  Indebtedness" means any Refinancing by the Company or any
Restricted Subsidiary of the Company of Indebtedness incurred in accordance with
Section 4.12 (other than  pursuant to clause (b),  (c), (d), (e), (f), (g), (j),
(k), (l), (n) or (o) of the definition of Permitted Indebtedness),  in each case
that does not (i) result in an increase  in the  aggregate  principal  amount of
Indebtedness  of such Person as of the date of such proposed  Refinancing  (plus
the amount of any premium  required to be paid under the terms of the instrument
governing such Indebtedness and plus the amount of reasonable  expenses incurred
by  the  Company  and  its  Restricted  Subsidiaries  in  connection  with  such
Refinancing)  or (ii) create  Indebtedness  with (x) a Weighted  Average Life to
Maturity  that is less  than  the  Weighted  Average  Life  to  Maturity  of the
Indebtedness  being  Refinanced or (y) a final  maturity  earlier than the final
maturity of the Indebtedness being Refinanced;  provided,  however,  that (1) if
such  Indebtedness  being  Refinanced  is  Indebtedness  of  the  Company  or  a

                                       23


Subsidiary Guarantor,  then such Refinancing  Indebtedness shall be Indebtedness
solely  of the  Company  and/or  such  Subsidiary  Guarantor  and  (2)  if  such
Indebtedness  being  Refinanced  is  subordinate  or  junior  to the  Notes or a
Guarantee,  then such Refinancing Indebtedness shall be subordinate to the Notes
or such  Guarantee,  as the case may be, at least to the same  extent and in the
same manner as the Indebtedness being Refinanced.

         "Registrar" has the meaning provided in Section 2.03.

         "Registration Rights Agreement" means the Registration Rights Agreement
dated the Issue Date among the Issuers and the Initial Purchaser.

         "Regulation S" means Regulation S under the Securities Act.

         "Related  Person"  of any Person  means any other  Person  directly  or
indirectly  owning 10% or more of the  outstanding  voting  Common Stock of such
Person (or, in the case of a Person  that is not a  corporation,  10% or more of
the equity interest in such Person).

         "Replacement Assets" shall have the meaning set forth in Section 4.16.

         "Restricted Payment" shall have the meaning set forth in Section 4.10.

         "Restricted  Security"  has the  meaning  assigned to such term in Rule
144(a)(3) under the Securities Act; provided, however, that the Trustee shall be
entitled to request and conclusively  rely on an Opinion of Counsel with respect
to whether any Note constitutes a Restricted Security.

         "Restricted Subsidiary" means any Subsidiary of the Company (including,
without limitation,  Canadian Abraxas) that has not been designated by the Board
of Directors of the Company, by a Board Resolution  delivered to the Trustee, as
an Unrestricted  Subsidiary pursuant to and in compliance with Section 4.14. Any
such designation may be revoked by a Board  Resolution of the Company  delivered
to the Trustee, subject to the provisions of such covenant.

         "Rule 144A" means Rule 144A under the Securities Act.

         "S&P" means Standard & Poor's Rating Services, a division of The McGraw
Hill Companies, Inc., and its successors.

         "Sale  and  Leaseback   Transaction"   means  any  direct  or  indirect
arrangement with any Person or to which any such Person is a party providing for
the leasing to the Company or a Restricted  Subsidiary of any property,  whether
owned by the Company or any  Restricted  Subsidiary at the Series A/B Issue Date
or later acquired, which has been or is to be sold or transferred by the Company
or such  Restricted  Subsidiary  to such Person or to any other Person from whom

                                       24


funds have been or are to be  advanced  by such  Person on the  security of such
property.

         "Securities Act" means the Securities Act of 1933, as amended,  and the
rules and regulations of the Commission promulgated thereunder.

         "Series A/B  Indenture"means  the  Indenture  dated as of November  14,
1996,  among the  Issuers and IBJ  Schroder  Bank & Trust  Company,  as Trustee,
providing  for the issuance of the Series A/B Notes in the  aggregate  principal
amount of  $215,000,000,  as such may be amended and  supplemented  from time to
time.

         "Series  A/B Issue  Date"  means the date on which the Series A/B Notes
were originally issued under the Series A/B Indenture.

         "Series  A/B Notes"  means the  Issuers 11 1/2%  Senior  Notes due 2004
issued  pursuant  to the  Series  A/B  Indenture,  as  such  may be  amended  or
supplemented from time to time.

         "Subsidiary," with respect to any Person,  means (a) any corporation of
which the  outstanding  Capital  Stock  having at least a majority  of the votes
entitled to be cast in the election of directors  under  ordinary  circumstances
shall at the time be owned,  directly or  indirectly,  by such Person or (b) any
other Person of which at least a majority of the voting  interest under ordinary
circumstances is at the time, directly or indirectly, owned by such Person.

         "Subsidiary   Guarantor"   means  each  of  the  Company's   Restricted
Subsidiaries that in the future executes a supplemental  indenture in which such
Restricted  Subsidiary  agrees to be bound by the terms of this  Indenture  as a
Subsidiary  Guarantor;   provided,  however,  that  any  Person  constituting  a
Subsidiary  Guarantor as described  above shall cease to constitute a Subsidiary
Guarantor  when its Guarantee is released in  accordance  with the terms of this
Indenture.

         "Surviving Entity" shall have the meaning set forth in Section 5.01.

         "TIA"  means  the  Trust  Indenture  Act  of  1939  (15  U.S.C.  ss.ss.
77aaa-77bbbb), as amended, as in effect on the date of this Indenture, except as
otherwise provided in Section 9.03.

         "Trust  Officer" means any officer or assistant  officer of the Trustee
assigned  by the  Trustee  to  administer  this  Indenture,  or in the case of a
successor  trustee,  an officer  assigned to the  department,  division or group
performing  the  corporation  trust  work  of such  successor  and  assigned  to
administer this Indenture.

         "Trustee"  means  the  party  named as such in this  Indenture  until a
successor  replaces it in accordance  with the  provisions of this Indenture and

                                       25


thereafter means such successor.

         "U.S.   Government   Obligations"  mean  direct   obligations  of,  and
obligations guaranteed by, the United States of America for the payment of which
the full faith and credit of the United States of America is pledged.

         "U.S. Legal Tender" means such coin or currency of the United States of
America  as at the time of  payment  shall be legal  tender  for the  payment of
public and private debts.

         "Unadjusted  Net  Proceeds  Offer  Amount" has the meaning set forth in
Section 4.16.

         "Unrestricted   Subsidiary"   means  any   Subsidiary  of  the  Company
designated as such pursuant to and in  compliance  with Section 4.14;  provided,
however,  that  Unrestricted  Subsidiaries  shall initially  include Cascade and
Western.  Any such  designation  may be  revoked  by a Board  Resolution  of the
Company  delivered to the  Trustee,  subject to the  provisions  of such Section
4.14.

         "Weighted  Average  Life  to  Maturity"  means,  when  applied  to  any
Indebtedness  at any date, the number of years obtained by dividing (a) the then
outstanding  aggregate principal amount of such Indebtedness into (b) the sum of
the total of the products  obtained by  multiplying  (i) the amount of each then
remaining  installment,  sinking fund, serial maturity or other required payment
of principal,  including payment at final maturity,  in respect thereof, by (ii)
the number of years  (calculated to the nearest  one-twelfth)  which will elapse
between such date and the making of such payment.

         "Western"  means  Western  Associated  Energy   Corporation,   a  Texas
Corporation.

         "Wholly Owned Restricted Subsidiary" means any Restricted Subsidiary of
which all the outstanding  voting  securities  normally  entitled to vote in the
election  of  directors  are  owned  by the  Company  or  another  Wholly  Owned
Restricted Subsidiary.

         SECTION 1.02.  Incorporation by Reference of TIA.

         Whenever  this  Indenture  refers  to a  provision  of  the  TIA,  such
provision is  incorporated  by reference in, and made a part of, this Indenture.
The following TIA terms used in this Indenture have the following meanings:

         "indenture securities" means the Notes.

         "indenture security holder" means a Holder.

                                       26


         "indenture to be qualified" means this Indenture.

         "indenture trustee" or "institutional trustee" means the Trustee.

         "obligor" on the  indenture  securities  means the Issuers or any other
obligor on the Notes.

         All other TIA terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another  statute or defined by  Commission  rule and
not otherwise defined herein have the meanings assigned to them therein.

         SECTION 1.03.  Rules of Construction.

         Unless the context otherwise requires:

                  (1)      a term has the meaning assigned to it;

                  (2) an accounting  term not otherwise  defined has the meaning
         assigned to it in accordance with GAAP of any date of determination;

                  (3)      "or" is not exclusive;

                  (4) words in the singular include the plural, and words in the
plural include the singular;

                  (5) "herein," "hereof" and other words of similar import refer
         to this Indenture as a whole and not to any particular Article, Section
         or other subdivision; and

                  (6) any reference to a statute,  law or regulation  means that
         statute,  law or  regulation as amended and in effect from time to time
         and  includes  any  successor  statute,  law or  regulation;  provided,
         however,  that any  reference  to the  Bankruptcy  Law  shall  mean the
         Bankruptcy Law as applicable to the relevant case.


                                   ARTICLE TWO

                                    THE NOTES

         SECTION 2.01.

         (a)      Principal Amount.

         The aggregate principal amount of Notes which may be issued,  executed,

                                       27


authenticated  and outstanding  under this Indenture is  $275,000,000,  provided
that  $215,000,000  shall be reserved for  issuance  and shall be available  for
issuance  only in  connection  with the  exchange  of the  Series  A/B Notes for
Exchange Notes.

         (b)      Form and Dating.

         The  Initial  Notes and the  Trustee's  certificate  of  authentication
relating  thereto shall be  substantially  in the form of Exhibit A hereto.  The
Exchange Notes and the Trustee's certificate of authentication  relating thereto
shall be  substantially  in the form of  Exhibit  B  hereto.  The Notes may have
notations,  legends or  endorsements  required by law,  stock  exchange  rule or
depository rule or usage.  The Issuers and the Trustee shall approve the form of
the Notes and any notation,  legend or endorsement  on them.  Each Note shall be
dated the date of its  issuance  and shall show the date of its  authentication.
Each Note shall have an executed Guarantee endorsed thereon substantially in the
form of Exhibit E hereto.

         The terms and  provisions  contained  in the Notes,  annexed  hereto as
Exhibits A and B, shall  constitute,  and are hereby  expressly  made, a part of
this Indenture and, to the extent  applicable,  the Issuers and the Trustee,  by
their  execution and delivery of this  Indenture,  expressly agree to such terms
and provisions and to be bound thereby.

         Notes offered and sold in reliance on Rule 144A, Notes offered and sold
to institutional  "accredited investors" (as defined in Rule 501(a)(1), (2), (3)
or (7) under the  Securities  Act) and Notes  offered  and sold in  reliance  on
Regulation  S shall be  issued  initially  in the form of one or more  permanent
global Notes in registered form,  substantially in the form set forth in Exhibit
A (the  "Global  Note"),  deposited  with  the  Trustee,  as  custodian  for the
Depository,  duly  executed  by the Issuers  (and  having an executed  Guarantee
endorsed thereon) and  authenticated by the Trustee as hereinafter  provided and
shall bear the legend set forth in Section 2.15. The aggregate  principal amount
of the  Global  Note  may  from  time to  time  be  increased  or  decreased  by
adjustments made on the records of the Trustee, as custodian for the Depository,
as hereinafter provided.

         Notes  issued in exchange for  interests  in a Global Note  pursuant to
Section  2.16 may be  issued  in the  form of  permanent  certificated  Notes in
registered form in substantially  the form set forth in Exhibit A (the "Physical
Notes").

         SECTION 2.02. Execution and Authentication; Aggregate Principal Amount.

         Two Officers,  or an Officer and an Assistant  Secretary of each Issuer
and each  Subsidiary  Guarantor,  shall sign,  or one Officer shall sign and one
Officer or an Assistant  Secretary  (each of whom shall, in each case, have been
duly authorized by all requisite  corporate  actions) shall attest to, the Notes
for the Issuers and the Guarantees  for the  Subsidiary  Guarantors by manual or
facsimile signature.

                                       28


         If an Officer or Assistant  Secretary whose signature is on a Note or a
Guarantee  was an Officer or Assistant  Secretary at the time of such  execution
but  no  longer   holds  that  office  or  position  at  the  time  the  Trustee
authenticates the Note, the Note shall nevertheless be valid.

         A Note shall not be valid until an authorized  signatory of the Trustee
manually  signs the  certificate  of  authentication  on the Note. The signature
shall be  conclusive  evidence that the Note has been  authenticated  under this
Indenture.

         The Trustee shall  authenticate (i) Initial Notes for original issue in
the aggregate principal amount not to exceed $60,000,000 and (ii) Exchange Notes
from time to time for issue  only in  exchange  for a like  principal  amount of
Initial  Notes  and up to  $215,000,000  of Series  A/B  Notes or (iii)  Private
Exchange  Notes, in each case upon a written order of the Issuers in the form of
an Officers'  Certificate of each Issuer.  Each such written order shall specify
the amount of Notes to be  authenticated  and the date on which the Notes are to
be  authenticated,  whether the Notes are to be Initial Notes or Exchange  Notes
and whether the Notes are to be issued as Physical Notes or Global Notes or such
other  information  as the Trustee may  reasonably  request.  In addition,  with
respect  to  authentication  pursuant  to  clauses  (ii) or (iii)  of the  first
sentence of this paragraph,  the first such written order from the Issuers shall
be  accompanied  by an Opinion of  Counsel of each  Issuer in a form  reasonably
satisfactory  to the Trustee  stating that the issuance of the Exchange Notes or
Private  Exchange  Notes,  as the case may be, does not give rise to an event of
default,  complies  with this  Indenture  and has been duly  authorized  by such
Issuer. The aggregate  principal amount of Notes outstanding at any time may not
exceed $275,000,000, except as provided in Sections 2.07 and 2.08; provided that
$215,000,000  of the  Exchange  Notes shall be  reserved  for  issuance  only in
exchange for Series A/B Notes.

         The Trustee may appoint an  authenticating  agent (the  "Authenticating
Agent")  reasonably  acceptable  to the Issuers to  authenticate  Notes.  Unless
otherwise provided in the appointment,  an Authenticating Agent may authenticate
Notes  whenever  the Trustee  may do so. Each  reference  in this  Indenture  to
authentication  by the Trustee includes  authentication  by such  Authenticating
Agent. An Authenticating  Agent has the same rights as an Agent to deal with the
Issuers or with any Affiliate of the Issuers.

         The Notes  shall be  issuable in fully  registered  form only,  without
coupons, in denominations of $1,000 and any integral multiple thereof.

         SECTION 2.03.  Registrar and Paying Agent.

         The Issuers shall  maintain an office or agency (which shall be located
in the Borough of  Manhattan  in the City of New York,  State of New York) where
(a) Notes may be presented or surrendered  for  registration  of transfer or for
exchange  ("Registrar"),  (b) Notes may be presented or surrendered  for payment
("Paying  Agent")  and (c) notices and demands to or upon the Issuers in respect

                                       29


of the Notes and this  Indenture  may be  served.  The  Registrar  shall  keep a
register of the Notes and of their  transfer and  exchange.  The  Issuers,  upon
prior written notice to the Trustee,  may have one or more co-Registrars and one
or more additional paying agents reasonably  acceptable to the Trustee. The term
"Paying  Agent"  includes any  additional  Paying Agent.  The Issuers may act as
their own Paying  Agent,  except that for the  purposes of payments on the Notes
pursuant to Sections 4.15 and 4.16, neither the Issuers nor any Affiliate of the
Issuers may act as Paying Agent.

         The Issuers shall enter into an appropriate  agency  agreement with any
Agent not a party to this  Indenture,  which  agreement  shall  incorporate  the
provisions of the TIA and implement the provisions of this Indenture that relate
to such Agent. The Issuers shall notify the Trustee, in advance, of the name and
address of any such Agent. If the Issuers fail to maintain a Registrar or Paying
Agent, or fail to give the foregoing notice, the Trustee shall act as such.

         The Issuers  initially  appoint the Trustee as Registrar,  Paying Agent
and agent for service of demands and notices in connection with the Notes, until
such time as the Trustee has resigned or a successor has been appointed.  Any of
the  Registrar,  the Paying  Agent or any other  agent may resign  upon 30 days'
notice to the Issuers.

         SECTION 2.04.  Paying Agent To Hold Assets in Trust.

         The Issuers  shall  require each Paying Agent other than the Trustee to
agree in writing  that such Paying  Agent shall hold in trust for the benefit of
the Holders or the  Trustee all assets held by the Paying  Agent for the payment
of principal of, premium, if any, or interest on, the Notes (whether such assets
have been  distributed  to it by the Issuers or any other obligor on the Notes),
and the Issuers and the Paying  Agent shall notify the Trustee of any Default by
the Issuers (or any other obligor on the Notes) in making any such payment.  The
Issuers at any time may require a Paying Agent to distribute  all assets held by
it to the Trustee and  account for any assets  disbursed  and the Trustee may at
any time during the continuance of any payment Default,  upon written request to
a Paying Agent, require such Paying Agent to distribute all assets held by it to
the Trustee and to account for any assets distributed.  Upon distribution to the
Trustee of all  assets  that shall  have been  delivered  by the  Issuers to the
Paying Agent, the Paying Agent shall have no further liability for such assets.

         SECTION 2.05.  Holder Lists.

         The  Trustee  shall  preserve  in as  current  a form as is  reasonably
practicable  the most recent list  available to it of the names and addresses of
the Holders.  If the Trustee is not the Registrar,  the Issuers shall furnish or
cause the  Registrar  to furnish to the  Trustee  before each Record Date and at
such other  times as the  Trustee  may request in writing a list as of such date
and in such  form  as the  Trustee  may  reasonably  require  of the  names  and
addresses  of the  Holders,  which list may be  conclusively  relied upon by the
Trustee.

                                       30


         SECTION 2.06.  Transfer and Exchange.

         When Notes are  presented  to the  Registrar or a  co-Registrar  with a
request to register the transfer of such Notes or to exchange  such Notes for an
equal principal amount of Notes or other authorized denominations, the Registrar
or co-Registrar shall register the transfer or make the exchange as requested if
its requirements for such transaction are met; provided, however, that the Notes
presented or surrendered for  registration of transfer or exchange shall be duly
endorsed or accompanied by a written instrument of transfer in form satisfactory
to the Issuers, the Trustee and the Registrar or co-Registrar,  duly executed by
the  Holder  thereof or his  attorney  duly  authorized  in  writing.  To permit
registration  of transfers  and  exchanges,  the Issuers  shall  execute and the
Trustee shall  authenticate  Notes and the Subsidiary  Guarantors  shall execute
Guarantees  thereon at the  Registrar's or  co-Registrar's  request.  No service
charge  shall be made for any  registration  of  transfer or  exchange,  but the
Issuers may require  payment of a sum  sufficient to cover any transfer tax, fee
or similar  governmental charge payable in connection  therewith (other than any
such transfer  taxes or similar  governmental  charge  payable upon exchanges or
transfers  pursuant to Sections 2.10,  3.04,  4.15, 4.16 or 9.05, in which event
the Issuers shall be responsible for the payment of such taxes).

         The  Registrar  or  co-Registrar  shall not be required to register the
transfer of or exchange of any Note (i) during a period beginning at the opening
of business 15 days  before the mailing of a notice of  redemption  of Notes and
ending at the close of business on the day of such mailing and (ii) selected for
redemption in whole or in part pursuant to Article Three,  except the unredeemed
portion of any Note being redeemed in part.

         Any  Holder  of a  beneficial  interest  in a  Global  Note  shall,  by
acceptance of such Global Note, agree that transfers of beneficial  interests in
such Global Notes may be effected only through a book entry system maintained by
the  Holder  of such  Global  Note  (or its  agent),  and  that  ownership  of a
beneficial  interest  in the Note shall be required  to be  reflected  in a book
entry system.

         SECTION 2.07.  Replacement Notes.

         If a mutilated Note is surrendered to the Trustee or if the Holder of a
Note claims that the Note has been lost,  destroyed  or  wrongfully  taken,  the
Issuers shall issue and the Trustee shall  authenticate  a replacement  Note and
the  Subsidiary  Guarantors  shall execute a Guarantee  thereon if the Trustee's
requirements  are met. If required  by the Trustee or the  Issuers,  such Holder
must  provide  an  indemnity  bond  or  other  indemnity  of  reasonable  tenor,
sufficient in the reasonable judgment of the Issuers, the Subsidiary  Guarantors
and the Trustee, to protect the Issuers, the Subsidiary Guarantors,  the Trustee
or any Agent from any loss  which any of them may suffer if a Note is  replaced.
Every replacement Note shall constitute an additional  obligation of the Issuers

                                       31


and the Subsidiary Guarantors.

         SECTION 2.08.  Outstanding Notes.

         Notes  outstanding  at any  time  are  all the  Notes  that  have  been
authenticated  by the Trustee except those canceled by it, those delivered to it
for cancellation and those described in this Section as not outstanding. Subject
to the  provisions  of  Section  2.09,  a Note does not cease to be  outstanding
because an Issuer or any of its Affiliates holds the Note.

         If a Note is replaced  pursuant to Section 2.07 (other than a mutilated
Note  surrendered  for  replacement),  it ceases to be  outstanding  unless  the
Trustee  receives proof  satisfactory  to it that the replaced Note is held by a
bona fide purchaser. A mutilated Note ceases to be outstanding upon surrender of
such Note and replacement thereof pursuant to Section 2.07.

         If on a  Redemption  Date or the  Maturity  Date the Paying Agent holds
U.S. Legal Tender or U.S.  Government  Obligations  sufficient to pay all of the
principal,  premium,  if any, and interest due on the Notes payable on that date
and is not prohibited from paying such money to the Holders thereof  pursuant to
the terms of this  Indenture,  then on and after that date such  Notes  shall be
deemed not to be outstanding and interest on them shall cease to accrue.

         SECTION 2.09.  Treasury Notes.

         In determining  whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver, consent or notice, Notes owned by
the Issuers or an Affiliate of the Issuers  shall be  considered  as though they
are not  outstanding,  except that for the purposes of  determining  whether the
Trustee shall be protected in relying on any such direction,  waiver or consent,
only Notes  which a Trust  Officer of the  Trustee  actually  knows are so owned
shall be so considered.  The Issuers shall notify the Trustee, in writing,  when
either of them or, to their knowledge,  any of their  Affiliates  repurchases or
otherwise  acquires  Notes, of the aggregate  principal  amount of such Notes so
repurchased or otherwise  acquired and such other information as the Trustee may
reasonably request and the Trustee shall be entitled to rely thereon.

         SECTION 2.10.  Temporary Notes.

         Until definitive Notes are ready for delivery,  the Issuers may prepare
and the Trustee  shall  authenticate  temporary  Notes upon receipt of a written
order of the  Issuers in the form of an  Officers'  Certificate.  The  Officers'
Certificate  shall specify the amount of temporary Notes to be authenticated and
the date on which the temporary Notes are to be  authenticated.  Temporary Notes
shall be  substantially  in the form of definitive Notes but may have variations
that the Issuers consider appropriate for temporary Notes and so indicate in the
Officers'  Certificate.  Without  unreasonable delay, the Issuers shall prepare,

                                       32


the Trustee  shall  authenticate  and the  Subsidiary  Guarantors  shall execute
Guarantees  on,  upon  receipt of a written  order of the  Issuers  pursuant  to
Section 2.02, definitive Notes in exchange for temporary Notes.

         SECTION 2.11.  Cancellation.

         The  Issuers  at  any  time  may  deliver  Notes  to  the  Trustee  for
cancellation.  The  Registrar  and the Paying Agent shall forward to the Trustee
any Notes surrendered to them for transfer, exchange or payment. The Trustee, or
at the direction of the Trustee,  the Registrar or the Paying Agent,  and no one
else, shall cancel and, at the written direction of the Issuers,  shall dispose,
in its  customary  manner,  of all Notes  surrendered  for  transfer,  exchange,
payment or cancellation.  Subject to Section 2.07, the Issuers may not issue new
Notes to  replace  Notes that they have paid or  delivered  to the  Trustee  for
cancellation.  If the Issuers shall acquire any of the Notes,  such  acquisition
shall  not  operate  as  a  redemption  or  satisfaction  of  the   Indebtedness
represented  by such  Notes  unless  and until the same are  surrendered  to the
Trustee for cancellation pursuant to this Section 2.11.

         SECTION 2.12.  Defaulted Interest.

         The Issuers will pay interest on overdue principal from time to time on
demand at the rate of interest then borne by the Notes.  The Issuers  shall,  to
the extent lawful,  pay interest on overdue  installments  of interest  (without
regard to any applicable  grace periods) from time to time on demand at the rate
of interest then borne by the Notes. Interest will be computed on the basis of a
360-day year  comprised of twelve 30-day  months,  and, in the case of a partial
month, the actual number of days elapsed.

         If the  Issuers  default in a payment of  interest  on the Notes,  they
shall pay the  defaulted  interest,  plus (to the extent  lawful)  any  interest
payable  on the  defaulted  interest,  to  the  Persons  who  are  Holders  on a
subsequent special record date, which special record date shall be the fifteenth
day next  preceding  the date fixed by the Issuers for the payment of  defaulted
interest or the next succeeding Business Day if such date is not a Business Day.
The  Issuers  shall  notify the  Trustee  in writing of the amount of  defaulted
interest  proposed to be paid on each Note and the date of the proposed  payment
(a "Default  Interest  Payment  Date"),  and at the same time the Issuers  shall
deposit  with the  Trustee  an amount  of money  equal to the  aggregate  amount
proposed  to be paid in  respect  of  such  defaulted  interest  or  shall  make
arrangements  satisfactory  to the Trustee  for such  deposit on or prior to the
date of the proposed payment,  such money when deposited to be held in trust for
the benefit of the Persons  entitled to such  defaulted  interest as provided in
this  Section;  provided,  however,  that in no event shall the Issuers  deposit
monies  proposed to be paid in respect of  defaulted  interest  later than 11:00
a.m. New York City time of the proposed  Default Interest Payment Date. At least
15 days before the  subsequent  special  record date, the Issuers shall mail (or
cause to be mailed) to each Holder, as of a recent date selected by the Issuers,
with a copy to the Trustee,  a notice that states the subsequent  special record

                                       33


date,  the  payment  date and the amount of  defaulted  interest,  and  interest
payable on such  defaulted  interest,  if any, to be paid.  Notwithstanding  the
foregoing,  any  interest  which is paid prior to the  expiration  of the 30-day
period set forth in Section  6.01(a)  shall be paid to Holders as of the regular
record date for the Interest  Payment Date for which interest has not been paid.
Notwithstanding  the  foregoing,  the Issuers may make payment of any  defaulted
interest in any other lawful manner not  inconsistent  with the  requirements of
any securities  exchange on which the Notes may be listed,  and upon such notice
as may be required by such exchange.

         SECTION 2.13. CUSIP Number.

         The Issuers in issuing the Notes may use a "CUSIP" number,  and, if so,
the Trustee shall use the CUSIP number in notices of redemption or exchange as a
convenience to Holders;  provided,  however,  that no  representation  is hereby
deemed to be made by the Trustee as to the  correctness or accuracy of the CUSIP
number  printed in the notice or on the Notes,  and that  reliance may be placed
only on the other identification numbers printed on the Notes. The Issuers shall
promptly notify the Trustee of any change in the CUSIP number.

         SECTION 2.14.  Deposit of Monies.

         Prior to 11:00 a.m. New York City time on each  Interest  Payment Date,
Maturity Date,  Redemption Date, Change of Control Payment Date and Net Proceeds
Offer Payment Date,  the Issuers shall have  deposited  with the Paying Agent in
immediately  available funds money sufficient to make cash payments, if any, due
on such Interest Payment Date, Maturity Date, Redemption Date, Change of Control
Payment  Date and Net  Proceeds  Offer  Payment  Date,  as the case may be, in a
timely  manner which permits the Paying Agent to remit payment to the Holders on
such Interest Payment Date,  Maturity Date,  Redemption Date,  Change of Control
Payment Date and Net Proceeds Offer Payment Date, as the case may be.

         SECTION 2.15.  Restrictive Legends.

         Each  Global  Note and  Physical  Note that  constitutes  a  Restricted
Security shall bear the following legend (the "Private Placement Legend") on the
face thereof  until after the third  anniversary  of the later of the Issue Date
and the last date on which an Issuer or any  Affiliate of either  Issuer was the
owner of such Note (or any predecessor security) (or such shorter period of time
as permitted by Rule 144(k) under the Securities Act or any successor  provision
thereunder)  (or  such  longer  period  of time  as may be  required  under  the
Securities Act or applicable state securities laws in the opinion of counsel for
the Issuers, unless otherwise agreed by the Issuers and the Holder thereof):

         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S.  SECURITIES ACT OF
         1933, AS AMENDED (THE "SECURITIES ACT"), AND,  ACCORDINGLY,  MAY NOT BE

                                       34


         OFFERED OR SOLD  WITHIN THE UNITED  STATES OR TO, OR FOR THE ACCOUNT OR
         BENEFIT OF, U.S.  PERSONS EXCEPT AS SET FORTH BELOW. BY ITS ACQUISITION
         HEREOF,  THE  HOLDER  (1)  REPRESENTS  THAT  (A)  IT  IS  A  "QUALIFIED
         INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT)
         OR (B) IT IS AN  "ACCREDITED  INVESTOR" (AS DEFINED IN RULE  501(a)(1),
         (2), (3), OR (7) UNDER THE SECURITIES ACT), (AN "ACCREDITED  INVESTOR")
         OR (C) IT IS NOT A U.S.  PERSON AND IS  ACQUIRING  THIS  SECURITY IN AN
         OFFSHORE  TRANSACTION IN COMPLIANCE  WITH RULE 904 UNDER THE SECURITIES
         ACT,  (2) AGREES THAT IT WILL NOT WITHIN TWO YEARS  AFTER THE  ORIGINAL
         ISSUANCE OF THIS  SECURITY  RESELL OR OTHERWISE  TRANSFER THIS SECURITY
         EXCEPT (A) TO THE ISSUERS THEREOF OR ANY SUBSIDIARY THEREOF, (B) INSIDE
         THE UNITED STATES TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH
         RULE 144A UNDER THE SECURITIES  ACT, (C) INSIDE THE UNITED STATES TO AN
         ACCREDITED  INVESTOR THAT,  PRIOR TO SUCH  TRANSFER,  FURNISHES (OR HAS
         FURNISHED  ON ITS  BEHALF  BY A U.S.  BROKER-DEALER)  TO THE  TRUSTEE A
         SIGNED  LETTER  CONTAINING  CERTAIN   REPRESENTATIONS   AND  AGREEMENTS
         RELATING TO THE  RESTRICTIONS ON TRANSFER OF THIS SECURITY (THE FORM OF
         WHICH LETTER CAN BE OBTAINED FROM THE TRUSTEE FOR THIS  SECURITY),  (D)
         OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH
         RULE 904  UNDER  THE  SECURITIES  ACT  (PROVIDED  THAT ANY SUCH SALE OR
         TRANSFER IN CANADA OR TO OR FOR THE BENEFIT OF A CANADIAN RESIDENT MUST
         BE  EFFECTED   PURSUANT  TO  AN  EXEMPTION   FROM  THE  PROSPECTUS  AND
         REGISTRATION  REQUIREMENTS UNDER APPLICABLE  CANADIAN SECURITIES LAWS),
         (E) PURSUANT TO THE EXEMPTION  FROM  REGISTRATION  PROVIDED BY RULE 144
         UNDER  THE  SECURITIES  ACT  (IF  AVAILABLE),  OR  (F)  PURSUANT  TO AN
         EFFECTIVE  REGISTRATION  STATEMENT  UNDER  THE  SECURITIES  ACT AND (3)
         AGREES  THAT IT WILL  GIVE TO EACH  PERSON  TO WHOM  THIS  SECURITY  IS
         TRANSFERRED  A NOTICE  SUBSTANTIALLY  TO THE EFFECT OF THIS LEGEND.  IN
         CONNECTION  WITH ANY TRANSFER OF THIS  SECURITY  WITHIN TWO YEARS AFTER
         THE ORIGINAL ISSUANCE OF THIS SECURITY,  IF THE PROPOSED  TRANSFEREE IS
         AN  ACCREDITED  INVESTOR,  THE  HOLDER  MUST,  PRIOR TO SUCH  TRANSFER,
         FURNISH TO THE  TRUSTEE  AND THE  ISSUERS  SUCH  CERTIFICATIONS,  LEGAL
         OPINIONS OR OTHER INFORMATION AS EITHER OF THEM MAY REASONABLY  REQUIRE
         TO CONFIRM  THAT SUCH  TRANSFER IS BEING MADE  PURSUANT TO AN EXEMPTION
         FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS

                                       35


         OF  THE   SECURITIES   ACT.  AS  USED  HEREIN,   THE  TERMS   "OFFSHORE
         TRANSACTION,"  "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANING GIVEN
         TO THEM BY REGULATION S UNDER THE SECURITIES ACT.

                  Each Global Note shall also bear the  following  legend on the
face thereof:

         UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR  SECURITIES IN
         DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE
         BY THE  DEPOSITORY  TO A  NOMINEE  OF THE  DEPOSITORY,  OR BY ANY  SUCH
         NOMINEE  OF THE  DEPOSITORY,  OR BY THE  DEPOSITORY  OR NOMINEE OF SUCH
         SUCCESSOR DEPOSITORY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITORY OR A
         NOMINEE  OF SUCH  SUCCESSOR  DEPOSITORY.  UNLESS  THIS  CERTIFICATE  IS
         PRESENTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST
         COMPANY, A NEW YORK CORPORATION  ("DTC"), TO AN ISSUER OR ITS AGENT FOR
         REGISTRATION  OF  TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE
         ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND  ANY  PAYMENT
         HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY
         AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
         HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH
         AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS  OF THIS GLOBAL  SECURITY  SHALL BE LIMITED TO  TRANSFERS  IN
         WHOLE,  BUT NOT IN PART,  TO  NOMINEES  OF CEDE & CO. OR TO A SUCCESSOR
         THEREOF OR SUCH  SUCCESSOR'S  NOMINEE AND TRANSFERS OF PORTIONS OF THIS
         GLOBAL  SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE  WITH
         THE RESTRICTIONS SET FORTH IN SECTION 2.17 OF THE INDENTURE.

         SECTION 2.16.  Book-Entry Provisions for Global Security.

         (a) The Global Notes  initially  shall (i) be registered in the name of
the  Depository  or the nominee of such  Depository,  (ii) be  delivered  to the
Trustee as custodian for such  Depository and (iii) bear legends as set forth in
Section 2.15.

         Members of, or participants in, the Depository  ("Agent Members") shall
have no rights  under this  Indenture  with  respect to any Global  Note held on
their behalf by the  Depository,  or the Trustee as its custodian,  or under the
Global Notes, and the Depository may be treated by the Issuers,  the Trustee and

                                       36




any Agent of the  Issuers or the  Trustee as the  absolute  owner of such Global
Note for all purposes whatsoever.  Notwithstanding the foregoing, nothing herein
shall  prevent  the  Issuers,  the  Trustee  or any Agent of the  Issuers or the
Trustee  from  giving  effect  to any  written  certification,  proxy  or  other
authorization  furnished by the Depository or impair,  as between the Depository
and its Agent  Members,  the  operation of  customary  practices  governing  the
exercise of the rights of a Holder of any Note.

         (b)  Transfers of a Global Note shall be limited to transfers in whole,
but not in part, to the Depository, its successors or their respective nominees.
Interests of beneficial  owners in a Global Note may be transferred or exchanged
for Physical Notes in accordance with the rules and procedures of the Depository
and the  provisions  of Section  2.17.  In  addition,  Physical  Notes  shall be
transferred to all beneficial owners in exchange for their beneficial  interests
in a Global Note if (i) the Depository notifies the Issuers that it is unwilling
or unable  to  continue  as  Depository  for the  Global  Notes and a  successor
depositary is not appointed by the Issuers within 90 days of such notice or (ii)
an Event of  Default  has  occurred  and is  continuing  and the  Registrar  has
received a written request from the Depository to issue Physical Notes.

         (c) In  connection  with any  transfer  or exchange of a portion of the
beneficial  interest in a Global Note to beneficial owners pursuant to paragraph
(b),  the  Registrar  shall (if one or more  Physical  Notes  are to be  issued)
reflect on its books and records the date and a decrease in the principal amount
of such Global Note in an amount equal to the principal amount of the beneficial
interest in the Global Note to be  transferred,  and the Issuers shall  execute,
the  Subsidiary  Guarantors  shall execute  Guarantees on, and the Trustee shall
authenticate and deliver, one or more Physical Notes of like tenor and amount.

         (d) In  connection  with  the  transfer  of an  entire  Global  Note to
beneficial owners pursuant to paragraph (b), such Global Note shall be deemed to
be surrendered to the Trustee for  cancellation,  and the Issuers shall execute,
the  Subsidiary  Guarantors  shall  execute  Guarantees on and the Trustee shall
authenticate and deliver,  to each beneficial owner identified by the Depository
in exchange for its beneficial  interest in the Global Note, an equal  aggregate
principal amount of Physical Notes of authorized denominations.

         (e) Any Physical Note constituting a Restricted  Security  delivered in
exchange  for an  interest in a Global Note  pursuant  to  paragraph  (b) or (c)
shall,  except as otherwise provided by paragraphs  (a)(i)(x) and (c) of Section
2.17, bear the legend regarding transfer restrictions applicable to the Physical
Notes set forth in Section 2.15.

         (f) The  Holder  of a  Global  Note may  grant  proxies  and  otherwise
authorize  any  Person,  including  Agent  Members  and  Persons  that  may hold
interests  through Agent Members,  to take any action which a Holder is entitled
to take under this Indenture or the Notes.

                                       37


         SECTION 2.17.  Special Transfer Provisions.

         (a)  Transfers  to  Non-QIB  Institutional   Accredited  Investors  and
Non-U.S.  Persons.  The  following  provisions  shall apply with  respect to the
registration  of any  proposed  transfer  of a Note  constituting  a  Restricted
Security to any Institutional  Accredited  Investor which is not a QIB or to any
Non-U.S. Person:

                    (i) the  Registrar  shall  register the transfer of any Note
         constituting a Restricted Security,  whether or not such Note bears the
         Private Placement  Legend,  if (x) the requested  transfer is after the
         second anniversary of the Issue Date (provided,  however,  that neither
         the Company nor any  Affiliate  of the Company has held any  beneficial
         interest in such Note, or portion  thereof,  at any time on or prior to
         the second  anniversary  of the Issue Date) or (y) (1) in the case of a
         transfer to an  Institutional  Accredited  Investor  which is not a QIB
         (excluding Non-U.S.  Persons), the proposed transferee has delivered to
         the  Registrar  a  certificate  substantially  in the form of Exhibit C
         hereto  or (2) in the case of a  transfer  to a  Non-U.S.  Person,  the
         proposed  transferor  has  delivered  to the  Registrar  a  certificate
         substantially in the form of Exhibit D hereto; and

                   (ii) if the proposed  transferor is an Agent Member holding a
         beneficial  interest in the Global Note,  upon receipt by the Registrar
         of (x) the certificate, if any, required by paragraph (i) above and (y)
         written  instructions given in accordance with the Depository's and the
         Registrar's procedures,

whereupon (a) the Registrar  shall reflect on its books and records the date and
(if the transfer does not involve a transfer of  outstanding  Physical  Notes) a
decrease in the  principal  amount of such Global Note in an amount equal to the
principal  amount  of  the  beneficial   interest  in  the  Global  Note  to  be
transferred,  and (b) the Issuers shall execute, the Subsidiary Guarantors shall
execute the Guarantees on and the Trustee shall  authenticate and deliver one or
more Physical Notes of like tenor and amount.

         (b)  Transfers  to QIBs.  The  following  provisions  shall  apply with
respect to the  registration of any proposed  transfer of a Note  constituting a
Restricted Security to a QIB (excluding transfers to Non-U.S.
Persons):

                    (i)  the  Registrar  shall  register  the  transfer  if such
         transfer is being made by a proposed transferor who has checked the box
         provided for on the form of Note stating,  or has otherwise advised the
         Issuers and the  Registrar  in writing,  that the sale has been made in
         compliance  with the  provisions  of Rule 144A to a transferee  who has
         signed the certification  provided for on the form of Note stating,  or
         has otherwise advised the Issuers and the Registrar in writing, that it
         is  purchasing  the Note for its own account or an account with respect
         to which it exercises  sole  investment  discretion and that it and any
         such  account is a QIB within  the  meaning of Rule 144A,  and is aware

                                       38


         that  the  sale to it is  being  made in  reliance  on  Rule  144A  and
         acknowledges  that  it has  received  such  information  regarding  the
         Issuers as it has requested pursuant to Rule 144A or has determined not
         to request such information and that it is aware that the transferor is
         relying  upon its  foregoing  representations  in  order  to claim  the
         exemption from registration provided by Rule 144A; and

                   (ii) if the proposed  transferee is an Agent Member,  and the
         Notes to be transferred  consist of Physical Notes which after transfer
         are to be evidenced  by an interest in a Global  Note,  upon receipt by
         the  Registrar of written  instructions  given in  accordance  with the
         Depository's  and  the  Registrar's  procedures,  the  Registrar  shall
         reflect  on its  books  and  records  the date and an  increase  in the
         principal  amount  of  such  Global  Note  in an  amount  equal  to the
         principal  amount  of the  Physical  Notes to be  transferred,  and the
         Trustee shall cancel the Physical Notes so transferred.

         (c)  Private   Placement  Legend.   Upon  the  transfer,   exchange  or
replacement  of Notes not bearing the Private  Placement  Legend,  the Registrar
shall  deliver  Notes that do not bear the Private  Placement  Legend.  Upon the
transfer, exchange or replacement of Notes bearing the Private Placement Legend,
the Registrar  shall deliver only Notes that bear the Private  Placement  Legend
unless (i) the requested  transfer is after the third  anniversary  of the Issue
Date  (provided,  however,  that neither Issuer nor any Affiliate of the Issuers
has held any beneficial  interest in such Note, or portion thereof,  at any time
prior to or on the  third  anniversary  of the  Issue  Date),  or (ii)  there is
delivered to the Registrar an Opinion of Counsel reasonably  satisfactory to the
Issuers and the Trustee to the effect that  neither  such legend nor the related
restrictions  on transfer are required in order to maintain  compliance with the
provisions of the Securities Act.

         (d)  General.  By  its  acceptance  of any  Note  bearing  the  Private
Placement  Legend,  each Holder of such a Note  acknowledges the restrictions on
transfer of such Note set forth in this  Indenture and in the Private  Placement
Legend and  agrees  that it will  transfer  such Note only as  provided  in this
Indenture.

         The  Registrar  shall retain  copies of all letters,  notices and other
written  communications  received pursuant to Section 2.16 or this Section 2.17.
The Issuers shall have the right to inspect and make copies of all such letters,
notices  or other  written  communications  at any  reasonable  time  during the
Registrar's  normal business hours upon the giving of reasonable  written notice
to the Registrar.

         (e)  Transfers  of  Notes  Held  by  Affiliates.  Any  certificate  (i)
evidencing a Note that has been  transferred to an Affiliate of an Issuer within
three years after the Issue Date,  as evidenced by a notation on the  Assignment
Form for such  transfer or in the  representation  letter  delivered  in respect
thereof  or (ii)  evidencing  a Note that has been  acquired  from an  Affiliate
(other than by an  Affiliate) in a transaction  or a chain of  transactions  not
involving any public offering,  shall,  until three years after the last date on

                                       39


which either Issuer or any Affiliate of either Issuer was an owner of such Note,
in each case, bear a legend in substantially  the form set forth in Section 2.15
hereof,  unless  otherwise agreed by the Issuers (with written notice thereof to
the Trustee).

         SECTION 2.18.  Liquidated Damages Under Registration Rights Agreement

         Under  certain  circumstances,  the Issuers  shall be  obligated to pay
certain liquidated damages to the Holders,  all as set forth in Section 4 of the
Registration Rights Agreement.  The terms thereof are hereby incorporated herein
by reference.


                                  ARTICLE THREE

                                   REDEMPTION

         SECTION 3.01.  Notices to Trustee

         If the Company  elects to redeem  Notes  pursuant to Paragraph 6 of the
Notes,  it shall  notify  the  Trustee  and the  Paying  Agent in writing of the
Redemption Date and the principal amount of the Notes to be redeemed.

         The Company shall give each notice provided for in this Section 3.01 60
days  before  the  Redemption  Date  (unless a shorter  notice  period  shall be
satisfactory  to the Trustee,  as evidenced in a writing signed on behalf of the
Trustee),  together with an Officers'  Certificate  stating that such redemption
shall comply with the conditions contained herein and in the Notes.

         SECTION 3.02.  Selection of Notes To Be Redeemed

         In the event that less than all of the Notes are to be  redeemed at any
time,  selection of such Notes, or portions thereof, for redemption will be made
by the Trustee in compliance  with the  requirements  of the principal  national
securities exchange,  if any, on which the Notes are listed or, if the Notes are
not then listed on a national securities  exchange,  on a pro rata basis, by lot
or by such  other  method  as the  Trustee  shall  deem  fair  and  appropriate;
provided,  however,  that no Notes of a principal amount of $1,000 or less shall
be redeemed in part; and provided, further, that if a partial redemption is made
with the  proceeds  of an Equity  Offering,  selection  of the Notes or portions
thereof for redemption  shall be made by the Trustee only on a pro rata basis or
on as nearly a pro rata basis as is  practicable  (subject to the  procedures of
DTC), unless such method is otherwise prohibited.  Notice of redemption shall be
mailed  by  first-class  mail at least 30 but not more than 60 days  before  the
Redemption Date to each Holder of Notes to be redeemed at its registered address
in accordance with the provisions of Section 3.04. If any Note is to be redeemed
in part only, the notice of redemption that relates to such Note shall state the
portion  of the  principal  amount  thereof  to be  redeemed.  A new  Note  in a

                                       40


principal  amount equal to the unredeemed  portion thereof will be issued in the
name of the Holder thereof upon  cancellation of the original Note. On and after
the  applicable  Redemption  Date,  interest  will  cease to  accrue on Notes or
portions  thereof  called for  redemption as long as the Issuers have  deposited
with the Paying  Agent for the Notes  funds in  satisfaction  of the  applicable
Redemption Price.

         SECTION 3.03.  Optional Redemption

         The Notes will be redeemable,  at the Issuers' option,  in whole at any
time or in part from time to time, on and after November 1, 2000,  upon not less
than 30 nor more  than 60  days'  notice,  at the  following  Redemption  Prices
(expressed as percentages of the principal  amount  thereof) if redeemed  during
the twelve-month  period  commencing on November 1 of the years set forth below,
plus, in each case, accrued and unpaid interest,  if any, thereon to the date of
redemption:

                  Year                            Percentage
                  2000.................            105.750%
                  2001.................            102.875%
                  2002 and thereafter..            100.000%

         At any time, or from time to time, on or prior to November 1, 1999, the
Issuers may, at their  option,  use all or a portion of the net cash proceeds of
one or more  Equity  Offerings  (as  defined  below)  to redeem up to 35% of the
aggregate  original principal amount of the Notes at a Redemption Price equal to
111.5% of the  aggregate  principal  amount of the  Notes to be  redeemed,  plus
accrued  and  unpaid  interest,  if any,  thereon  to the  date  of  redemption;
provided,  however, that at least 65% of the aggregate original principal amount
of the Notes  remains  outstanding  immediately  after giving effect to any such
redemption (it being expressly  agreed that for purposes of determining  whether
this  condition  is  satisfied,  Notes  owned by  either  Issuer or any of their
Affiliates  shall be  deemed  not to be  outstanding).  In order to  effect  the
foregoing redemption with the proceeds of any Equity Offering, the Issuers shall
make such  redemption not more than 60 days after the  consummation  of any such
Equity Offering.

         SECTION 3.04.  Notice of Redemption

         At least 30 days but not more than 60 days  before a  Redemption  Date,
the  Issuers  shall mail or cause to be mailed a notice of  redemption  by first
class mail to each  Holder of Notes to be redeemed  at its  registered  address,
with a copy to the Trustee and any Paying Agent.  At the Issuers'  request,  the
Trustee  shall give the notice of  redemption  in the  Issuers'  name and at the
Company's expense.  The Issuers' shall provide such notices of redemption to the
Trustee at least five days before the intended mailing date.

         Each notice of redemption  shall identify  (including the CUSIP number)

                                       41


the Notes to be redeemed and shall state:

                  (1) the Redemption Date;

                  (2) the Redemption  Price and the amount of accrued  interest,
         if any, to be paid;

                  (3) the name and address of the Paying Agent;

                  (4) the  subparagraph  of the  Notes  pursuant  to which  such
         redemption is being made;

                  (5) that Notes called for  redemption  must be  surrendered to
         the Paying Agent to collect the Redemption Price plus accrued interest,
         if any;

                  (6) that,  unless the Issuers default in making the redemption
         payment,  interest on Notes or applicable  portions  thereof called for
         redemption  ceases to accrue on and after the Redemption  Date, and the
         only remaining right of the Holders of such Notes is to receive payment
         of the  Redemption  Price plus  accrued  interest as of the  Redemption
         Date, if any, upon surrender to the Paying Agent of the Notes redeemed;

                  (7) if any Note is being  redeemed in part, the portion of the
         principal  amount  of such  Note to be  redeemed  and  that,  after the
         Redemption  Date,  and upon surrender of such Note, a new Note or Notes
         in the  aggregate  principal  amount  equal to the  unredeemed  portion
         thereof will be issued; and

                  (8) if  fewer  than  all the  Notes  are to be  redeemed,  the
         identification  of the  particular  Notes (or  portion  thereof)  to be
         redeemed,  as well as the  aggregate  principal  amount  of Notes to be
         redeemed and the aggregate  principal amount of Notes to be outstanding
         after such partial redemption.

         The Issuers will comply with the  requirements  of Rule 14e-1 under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent such laws and  regulations are applicable in connection with the purchase
of Notes.

         SECTION 3.05.  Effect of Notice of Redemption

         Once notice of redemption  is mailed in  accordance  with Section 3.04,
such notice of redemption  shall be irrevocable  and Notes called for redemption
become due and payable on the Redemption  Date and at the Redemption  Price plus
accrued  interest  as of such date,  if any.  Upon  surrender  to the Trustee or
Paying Agent,  such Notes called for redemption  shall be paid at the Redemption
Price plus accrued  interest thereon to the Redemption Date, but installments of
interest,  the maturity of which is on or prior to the Redemption Date, shall be
payable to Holders of record at the close of  business  on the  relevant  record

                                       42


dates referred to in the Notes. Interest shall accrue on or after the Redemption
Date and  shall  be  payable  only if the  Issuers  default  in  payment  of the
Redemption Price.

         SECTION 3.06.  Deposit of Redemption Price

         On or before the Redemption  Date and in accordance  with Section 2.14,
the Issuers shall deposit with the Paying Agent U.S. Legal Tender  sufficient to
pay the  Redemption  Price plus  accrued  interest,  if any,  of all Notes to be
redeemed on that date. The Paying Agent shall promptly return to the Company any
U.S.  Legal Tender so deposited  which is not required for that purpose,  except
with respect to monies owed as  obligations  to the Trustee  pursuant to Article
Seven.

         Unless the Issuers  fail to comply  with the  preceding  paragraph  and
default in the payment of such Redemption Price plus accrued  interest,  if any,
interest  on the  Notes to be  redeemed  will  cease to  accrue on and after the
applicable Redemption Date, whether or not such Notes are presented for payment.

         SECTION 3.07.  Notes Redeemed in Part

         Upon  surrender  of a Note that is to be redeemed in part,  the Trustee
shall  authenticate for the Holder a new Note or Notes equal in principal amount
to the unredeemed portion of the Note surrendered.


                                  ARTICLE FOUR

                                    COVENANTS

         SECTION 4.01.  Payment of Notes

         (a) The  Issuers  shall pay the  principal  of,  premium,  if any,  and
interest  on the Notes on the dates and in the manner  provided in the Notes and
in this Indenture.

         (b) An  installment  of  principal of or interest on the Notes shall be
considered paid on the date it is due if the Trustee or Paying Agent (other than
an Issuer or any of its  Affiliates)  holds,  prior to 11:00 a.m.  New York City
time on that date,  U.S.  Legal Tender  designated for and sufficient to pay the
installment in full and is not prohibited  from paying such money to the Holders
pursuant to the terms of this Indenture or the Notes.

         (c)  Notwithstanding   anything  to  the  contrary  contained  in  this
Indenture,  the Issuers  may,  to the extent they are  required to do so by law,
deduct or withhold income or other similar taxes imposed by the United States of
America from principal or interest payments hereunder.

                                       43


         SECTION 4.02.  Maintenance of Office or Agency

         The Issuers shall maintain the office or agency  required under Section
2.03.  The  Issuers  shall  give  prior  written  notice to the  Trustee  of the
location,  and any change in the location,  of such office or agency.  If at any
time the Issuers  shall fail to maintain any such  required  office or agency or
shall fail to furnish the Trustee with the address thereof,  such presentations,
surrenders,  notices  and  demands  may be made or served at the  address of the
Trustee set forth in Section 10.02.

         SECTION 4.03.  Corporate Existence

         Except as otherwise  permitted by Article Five, the Issuers shall do or
cause  to be done,  at their  own cost and  expense,  all  things  necessary  to
preserve and keep in full force and effect their respective  corporate existence
and the  corporate  existence  of  each  of  their  Restricted  Subsidiaries  in
accordance with the respective  organizational documents of each such Restricted
Subsidiary and the material rights (charter and statutory) and franchises of the
Issuers and each such Restricted Subsidiary; provided, however, that the Issuers
shall not be required to  preserve,  with  respect to  themselves,  any material
right or franchise  and, with respect to any of their  Restricted  Subsidiaries,
any such  existence,  material right or franchise,  if the Board of Directors of
the Company shall  determine in good faith that the  preservation  thereof is no
longer  desirable  in the  conduct  of the  business  of the  Issuers  and their
Subsidiaries, taken as a whole.

         SECTION 4.04.  Payment of Taxes and Other Claims

         The Issuers  shall pay or discharge or cause to be paid or  discharged,
before the same shall become delinquent, (i) all material taxes, assessments and
governmental  charges (including  withholding taxes and any penalties,  interest
and  additions  to taxes)  levied or imposed upon either of them or any of their
Subsidiaries  or properties of either of them or any of their  Subsidiaries  and
(ii) all material  lawful  claims for labor,  materials  and supplies  that,  if
unpaid,  might by law become a Lien upon the  property  of the Issuers or any of
their Subsidiaries; provided, however, that the Issuers shall not be required to
pay or discharge  or cause to be paid or  discharged  any such tax,  assessment,
charge or claim whose amount,  applicability  or validity is being  contested in
good faith by appropriate  negotiations or proceedings  properly  instituted and
diligently  conducted for which adequate reserves,  to the extent required under
GAAP, have been taken.

         SECTION 4.05.  Maintenance of Properties and Insurance

         (a)  Each  Issuer  shall,  and  shall  cause  each  of  the  Restricted
Subsidiaries  to,  maintain all properties  used or useful in the conduct of its
business in good working order and condition (subject to ordinary wear and tear)
and make all necessary repairs, renewals,  replacements,  additions, betterments
and  improvements  thereto  and  actively  conduct  and  carry on its  business;


                                       44


provided,  however, that nothing in this Section 4.05 shall prevent an Issuer or
any  of  the  Restricted  Subsidiaries  from  discontinuing  the  operation  and
maintenance  of any of its  properties,  if  such  discontinuance  is (i) in the
ordinary course of business pursuant to customary  business terms or (ii) in the
good faith  judgment of the  respective  Boards of Directors or other  governing
body of such Issuer or Restricted  Subsidiary,  as the case may be, desirable in
the conduct of their  respective  businesses and is not  disadvantageous  in any
material respect to the Holders.

         (b) The Issuers shall provide or cause to be provided,  for  themselves
and  each  of the  Restricted  Subsidiaries,  insurance  (including  appropriate
self-insurance)  against  loss or damage of the kinds  that,  in the good  faith
judgment of the Company,  are adequate  and  appropriate  for the conduct of the
business of the Company and its  Restricted  Subsidiaries  in a prudent  manner,
with reputable  insurers or with the government of the United States of America,
Canada or an agency  or  instrumentality  thereof,  in such  amounts,  with such
deductibles,  and by such  methods  as shall  be  customary,  in the good  faith
judgment of the Company, for companies similarly situated in the industry.

         SECTION 4.06.  Compliance Certificate; Notice of Default

         (a) The Issuers shall deliver to the Trustee, within 105 days after the
end  of  their  respective  fiscal  quarters  and  fiscal  years,  an  Officers'
Certificate  of  each  of  the  Issuers  (provided,  however,  that  one  of the
signatories to each such Officers'  Certificate shall be the respective Issuer's
principal executive officer, principal financial officer or principal accounting
officer), as to such Officers' knowledge, without independent investigation,  of
such Issuer's  compliance with all conditions and covenants under this Indenture
(without  regard  to any  period  of grace or  requirement  of  notice  provided
hereunder)  and in the event any Default of the Issuers  exists,  such  Officers
shall specify the nature of such Default.  Each such Officers' Certificate shall
also notify the Trustee  should such Issuer  elect to change the manner in which
it fixes its fiscal year end.

         (b) So long as not contrary to the then current  recommendations of the
American  Institute  of  Certified  Public  Accountants,  the  annual  financial
statements  delivered pursuant to Section 4.08 shall be accompanied by a written
report of the Company's independent certified public accountants (who shall be a
firm  of  established   national   reputation)  stating  (A)  that  their  audit
examination has included a review of the terms of this Indenture and the form of
the Notes as they relate to accounting  matters,  and (B) whether, in connection
with their audit examination,  any Default or Event of Default has come to their
attention and if such a Default or Event of Default has come to their attention,
specifying the nature and period of existence thereof; provided,  however, that,
without  any  restriction  as to  the  scope  of  the  audit  examination,  such
independent  certified public  accountants  shall not be liable by reason of any
failure to obtain  knowledge  of any such Default or Event of Default that would


                                       45


not be disclosed in the course of an audit  examination  conducted in accordance
with generally accepted auditing standards.

         (c)  (i) If any  Default  or  Event  of  Default  has  occurred  and is
continuing  or (ii) if any Holder  seeks to exercise any remedy  hereunder  with
respect to a claimed  Default  under this  Indenture  or the Notes,  the Company
shall deliver to the Trustee,  at its address set forth in Section 10.02 hereof,
by registered or certified  mail or by facsimile  transmission  followed by hard
copy by registered or certified mail an Officers'  Certificate  specifying  such
event,  notice  or other  action  within 10 days of its  becoming  aware of such
occurrence.

         SECTION 4.07.  Compliance with Laws

         The Issuers shall comply, and shall cause each of their Subsidiaries to
comply,  with  all  applicable   statutes,   rules,   regulations,   orders  and
restrictions  of the United  States of  America,  all states and  municipalities
thereof,  and of any  governmental  department,  commission,  board,  regulatory
authority,  bureau,  agency and instrumentality of the foregoing,  in respect of
the conduct of their respective businesses and the ownership of their respective
properties,  except  for such  noncompliances  as  could  not  singly  or in the
aggregate  reasonably  be  expected  to have a  material  adverse  effect on the
financial condition, business, prospects or results of operations of the Company
and its Subsidiaries taken as a whole.

         SECTION 4.08.  Reports to Holders

         The Company will deliver to the Trustee within 15 days after filing the
same with the Commission,  copies of the quarterly and annual reports and of the
information,  documents and other reports, if any, which the Company is required
to file with the Commission pursuant to Section 13 or 15(d) of the Exchange Act.
Notwithstanding   that  the  Company  may  not  be  subject  to  the   reporting
requirements  of Section 13 or 15(d) of the Exchange  Act, the Company will file
with the  Commission,  to the extent  permitted,  and  provide  the  Trustee and
Holders  with such annual  reports  and such  information,  documents  and other
reports specified in Sections 13 and 15(d) of the Exchange Act. The Company will
also comply with the other provisions of Section 314(a) of the TIA.

         SECTION 4.09.  Waiver of Stay, Extension or Usury Laws

         The Issuers  covenant (to the extent that they may lawfully do so) that
they will not at any time insist upon,  plead, or in any manner whatsoever claim
or take the benefit or advantage  of, any stay or extension law or any usury law
or other law that would  prohibit or forgive the Issuers  from paying all or any
portion of the  principal  of or interest on the Notes as  contemplated  herein,
wherever enacted, now or at any time hereafter in force, or which may affect the
covenants or the performance of this Indenture; and (to the extent that they may
lawfully do so) the Issuers hereby  expressly  waive all benefit or advantage of
any such  law,  and  covenant  that they will not  hinder,  delay or impede  the


                                       46


execution of any power herein granted to the Trustee, but will suffer and permit
the execution of every such power as though no such law had been enacted.

         SECTION 4.10.  Limitation on Restricted Payments

         The  Company  will  not,  and  will  not  cause  or  permit  any of its
Restricted Subsidiaries to, directly or indirectly,

                  (i)  declare  or pay any  dividend  or make  any  distribution
         (other than  dividends  or  distributions  payable  solely in Qualified
         Capital  Stock  of the  Company)  on or in  respect  of  shares  of the
         Company's Capital Stock to holders of such Capital Stock;

                   (ii)  purchase,  redeem or  otherwise  acquire  or retire for
         value any  Capital  Stock of the  Company  or any  warrants,  rights or
         options  to  purchase  or acquire  shares of any class of such  Capital
         Stock other than  through the  exchange  therefor  solely of  Qualified
         Capital Stock of the Company or warrants, rights or options to purchase
         or acquire shares of Qualified Capital Stock of the Company;

                  (iii)  make  any  principal  payment  on,  purchase,  defease,
         redeem,  prepay,  decrease  or  otherwise  acquire or retire for value,
         prior to any scheduled final maturity, scheduled repayment or scheduled
         sinking fund payment,  any  Indebtedness of the Company or a Subsidiary
         Guarantor  that is  subordinate  or junior in right of  payment  to the
         Notes or such Subsidiary Guarantor's Guarantee, as the case may be; or

                   (iv) make any Investment (other than a Permitted Investment)

(each of the foregoing  actions set forth in clauses (i),  (ii),  (iii) and (iv)
being referred to as a "Restricted Payment"),  if at the time of such Restricted
Payment or immediately after giving effect thereto, (a) a Default or an Event of
Default  shall have occurred and be  continuing,  (b) the Company is not able to
incur  at  least  $1.00  of  additional   Indebtedness   (other  than  Permitted
Indebtedness)  in  compliance  with  Section  4.12;  provided,   however,   that
notwithstanding  the  provisions of clause (i) (a) of Section 4.12, for purposes
of  determining  whether the Company  could incur such  additional  Indebtedness
pursuant to this clause (b), the Consolidated  EBITDA Coverage Ratio which shall
be  required  shall be at  least  2.5 to 1.0,  or (c) the  aggregate  amount  of
Restricted Payments (including such proposed Restricted Payment) made subsequent
to the Series A/B Issue Date (the amount  expended for such  purposes,  if other
than in  cash,  being  the fair  market  value of such  property  as  determined
reasonably  and in good faith by the Board of Directors  of the  Company)  shall
exceed the sum of:

                  (A)  50% of the  cumulative  Consolidated  Net  Income  (or if


                                       47


         cumulative  Consolidated Net Income shall be a loss, minus 100% of such
         loss) of the Company earned subsequent to the Series A/B Issue Date and
         on  or  prior  to  the  last  date  of  the  Company's  fiscal  quarter
         immediately  preceding such Restricted  Payment (the "Reference  Date")
         (treating such period as a single accounting period); plus

                  (B) 100% of the aggregate  net cash  proceeds  received by the
         Company  from any Person  (other than a  Restricted  Subsidiary  of the
         Company) from the issuance and sale  subsequent to the Series A/B Issue
         Date and on or prior to the Reference  Date of Qualified  Capital Stock
         of the Company, plus

                  (C)  without  duplication  of  any  amounts  included  in  the
         immediately  preceding  subclause  (B),  100% of the aggregate net cash
         proceeds of any equity  contribution  received  by the  Company  from a
         holder of the  Company's  Capital  Stock  (excluding in the case of the
         immediately  preceding  clause (B) and this  clause  (C),  any net cash
         proceeds  from an Equity  Offering  to the  extent  used to redeem  the
         Notes, including any additional Series D Notes); plus

                  (D) an amount  equal to the net  reduction in  Investments  in
         Unrestricted Subsidiaries resulting from dividends,  interest payments,
         repayments  of loans or advances,  or other  transfers of cash, in each
         case to the Company or to any Restricted Subsidiary of the Company from
         Unrestricted  Subsidiaries (but without  duplication of any such amount
         included  in  calculating  cumulative  Consolidated  Net  Income of the
         Company),  or  from  redesignations  of  Unrestricted  Subsidiaries  as
         Restricted  Subsidiaries  (in each case  valued as  provided in Section
         4.14), not to exceed, in the case of any Unrestricted  Subsidiary,  the
         amount of Investments  previously made by the Company or any Restricted
         Subsidiary in such  Unrestricted  Subsidiary and which was treated as a
         Restricted Payment hereunder; plus

                  (E) without duplication of the immediately preceding subclause
         (D),  an amount  equal to the  lesser of the cost or net cash  proceeds
         received  upon the sale or other  disposition  of any  Investment  made
         after the Series A/B Issue Date which had been  treated as a Restricted
         Payment  (but  without  duplication  of any  such  amount  included  in
         calculating cumulative Consolidated Net Income of the Company); plus

                  (F)      $5,000,000.

Notwithstanding the foregoing, the provisions set forth above will not prohibit:

                  (1) The payment of any dividend or redemption  payment  within
         60 days after the date of  declaration  of such  dividend or applicable
         redemption if the dividend or redemption  payment,  as the case may be,
         would have been permitted on the date of declaration;


                                       48


                  (2) If no Default or Event of Default  shall have occurred and
         be  continuing,  the  acquisition of any shares of Capital Stock of the
         Company,  either (a) solely in exchange for shares of Qualified Capital
         Stock of the Company or (b) through the  application of net proceeds of
         a  substantially  concurrent  sale for cash (other than to a Restricted
         Subsidiary of the Company) of shares of Qualified  Capital Stock of the
         Company;

                  (3) If no Default or Event of Default  shall have occurred and
         be continuing,  the  acquisition of any  Indebtedness of the Company or
         Subsidiary  Guarantor that is subordinate or junior in right of payment
         to the Notes or such Subsidiary Guarantor's Guarantee,  as the case may
         be, either (a) solely in exchange for shares of Qualified Capital Stock
         of the Company or (b) through the  application of the net proceeds of a
         substantially  concurrent  sale for cash  (other  than to a  Restricted
         Subsidiary of the Company) of (i) shares of Qualified  Capital Stock of
         the Company or (ii) Refinancing Indebtedness; and

                  (4)  The  initial   designation  of  Cascade  and  Western  as
Unrestricted Subsidiaries.

         In  determining  the  aggregate  amount  of  Restricted  Payments  made
subsequent  to the Series A/B Issue Date in  accordance  with clause (c) of this
Section  4.10,  amounts  expended  pursuant to clauses  (1) and (2)(b)  shall be
included in such calculation.

         SECTION 4.11.  Limitation on Transactions with Affiliates

         (i) The  Company  will not,  and will not  cause or  permit  any of its
Restricted Subsidiaries to, directly or indirectly,  enter into, amend or permit
or suffer to exist any transaction or series of related transactions (including,
without limitation,  the purchase,  sale, lease or exchange of any property, the
guaranteeing  of any  Indebtedness  or the rendering of any service) with or for
the benefit of any of their respective Affiliates (an "Affiliate  Transaction"),
other than (a) Affiliate  Transactions  permitted  under  paragraph (ii) of this
Section 4.11 and (b) Affiliate  Transactions that are on terms that are fair and
reasonable to the Company or the  applicable  Restricted  Subsidiary  and are no
less favorable to the Company or the applicable Restricted Subsidiary than those
that might  reasonably  have been obtained in a comparable  transaction  at such
time on an  arm's-length  basis from a Person  that is not an  Affiliate  of the
Company or such  Restricted  Subsidiary.  All Affiliate  Transactions  (and each
series of related Affiliate  Transactions  which are similar or part of a common
plan) involving aggregate payments or other property with a fair market value in
excess of $1,000,000 shall be approved by the Board of Directors of the Company,
such approval to be evidenced by a Board  Resolution  stating that such Board of
Directors  has  determined  that such  transaction  complies  with the foregoing
provisions. If the Company or any Restricted Subsidiary enters into an Affiliate
Transaction (or a series of related Affiliate  Transactions  related to a common


                                       49


plan) that involves an aggregate fair market value of more than $10,000,000, the
Company shall, prior to the consummation thereof,  obtain a favorable opinion as
to the fairness of such  transaction  or series of related  transactions  to the
Company  or the  relevant  Restricted  Subsidiary,  as the case  may be,  from a
financial point of view, from an Independent  Advisor and file the same with the
Trustee.

         (ii) The  restrictions  set forth in clause  (i) shall not apply to (a)
reasonable fees and  compensation  paid to and indemnity  provided on behalf of,
officers,  directors,  employees or consultants of the Company or any Restricted
Subsidiary  as  determined  in good  faith by the Board of  Directors  or senior
management of the Company or such Restricted Subsidiary, as the case may be; (b)
transactions  exclusively between or among the Company and any of its Restricted
Subsidiaries  or  exclusively  between  or among such  Restricted  Subsidiaries;
provided, however, that such transactions are not otherwise prohibited hereunder
and (c) Restricted Payments permitted hereunder.

         SECTION 4.12.  Limitation on Incurrence of Additional Indebtedness

         Other than Permitted  Indebtedness,  the Company will not, and will not
cause or permit any of its Restricted  Subsidiaries  to, directly or indirectly,
create,  incur,  assume,  guarantee,  acquire,  become liable,  contingently  or
otherwise,  with  respect to, or  otherwise  become  responsible  for payment of
(collectively,  "incur") any Indebtedness; provided, however, that if no Default
or Event of Default shall have occurred and be continuing at the time of or as a
consequence  of the  incurrence  of any such  Indebtedness,  the Company and the
Restricted  Subsidiaries  or any of  them  may  incur  Indebtedness  (including,
without limitation,  Acquired Indebtedness), in each case, if on the date of the
incurrence of such Indebtedness, after giving pro forma effect to the incurrence
thereof and the receipt and application of the proceeds therefrom,  (i) both (a)
the Company's  Consolidated EBITDA Coverage Ratio would have been at least equal
to 2.5 to 1.0 and (b) the Company's  Adjusted  Consolidated  Net Tangible Assets
are equal to or greater than 150% of the aggregate consolidated  Indebtedness of
the Company  and its  Restricted  Subsidiaries  or (ii) the  Company's  Adjusted
Consolidated  Net  Tangible  Assets  are  equal to or  greater  than 200% of the
aggregate   consolidated   Indebtedness   of  the  Company  and  its  Restricted
Subsidiaries.

         For purposes of determining any particular amount of Indebtedness under
this  Section  4.12,  guarantees  of  Indebtedness  otherwise  included  in  the
determination of such amount shall not also be included.

         Indebtedness  of a Person  existing at the time such  Person  becomes a
Restricted Subsidiary (whether by merger, consolidation,  acquisition of Capital
Stock or  otherwise)  or is merged  with or into the  Company or any  Restricted
Subsidiary or which is secured by a Lien on an asset  acquired by the Company or
a  Restricted  Subsidiary  (whether or not such  Indebtedness  is assumed by the
acquiring  Person)  shall be deemed  incurred  at the time the Person  becomes a
Restricted  Subsidiary or at the time of the asset acquisition,  as the case may
be.

                                       50


         The Company will not, and will not permit any  Subsidiary  Guarantor to
incur any  Indebtedness  which by its  terms  (or by the terms of any  agreement
governing such  Indebtedness)  is  subordinated in right of payment to any other
Indebtedness   of  the  Company  or  such  Subsidiary   Guarantor   unless  such
Indebtedness  is also by its terms (or by the terms of any  agreement  governing
such Indebtedness)  made expressly  subordinate in right of payment to the Notes
or the Guarantee of such Subsidiary  Guarantor,  as the case may be, pursuant to
subordination  provisions that are substantively  identical to the subordination
provisions of such  Indebtedness  (or such agreement) that are most favorable to
the  holders  of any  other  Indebtedness  of the  Company  or  such  Subsidiary
Guarantor, as the case may be.

         SECTION 4.13.  Limitation  on Dividend and Other  Payment  Restrictions
Affecting Restricted Subsidiaries

         The  Company  will  not,  and  will  not  cause  or  permit  any of its
Restricted Subsidiaries to, directly or indirectly, create or otherwise cause or
permit  to exist or become  effective  any  encumbrance  or  restriction  on the
ability of any  Restricted  Subsidiary  to: (a) pay  dividends or make any other
distributions on or in respect of its Capital Stock; (b) make loans or advances,
or pay any  Indebtedness or other  obligation  owed, to the Company or any other
Restricted Subsidiary; (c) guarantee any Indebtedness or any other obligation of
the Company or any Restricted Subsidiary; or (d) transfer any of its property or
assets to the Company or any other Restricted  Subsidiary (each such encumbrance
or  restriction,  a  "Payment  Restriction"),  except for such  encumbrances  or
restrictions  existing  under or by reason  of:  (1)  applicable  law;  (2) this
Indenture and the Series A/B Indenture;  (3) the Credit Facility;  (4) customary
non-assignment  provisions  of any  contract or any lease  governing a leasehold
interest of any Restricted  Subsidiary;  (5) any instrument  governing  Acquired
Indebtedness,  which  encumbrance  or  restriction  is not  applicable  to  such
Restricted   Subsidiary,   or  the  properties  or  assets  of  such  Restricted
Subsidiary,  other  than the Person or the  property  or assets of the Person so
acquired;  (6)  agreements  existing  on the Issue Date to the extent and in the
manner  such  agreements  are  in  effect  on  the  Issue  Date;  (7)  customary
restrictions with respect to a Restricted  Subsidiary of the Company pursuant to
an agreement  that has been entered into for the sale or  disposition of Capital
Stock or assets of such  Restricted  Subsidiary to be  consummated in accordance
with the terms of this  Indenture  solely in  respect  of the  assets or Capital
Stock to be sold or disposed of; (8) any instrument  governing a Permitted Lien,
to the extent and only to the extent such  instrument  restricts the transfer or
other  disposition of assets subject to such Permitted Lien; or (9) an agreement
governing  Refinancing  Indebtedness  incurred  to  Refinance  the  Indebtedness
issued,  assumed or incurred pursuant to an agreement referred to in clause (2),
(3), (5) or (6) above;  provided,  however, that the provisions relating to such
encumbrance or restriction contained in any such Refinancing Indebtedness are no
less favorable to the Holders in any material respect as determined by the Board
of Directors of the Company in their reasonable and good faith judgment than the
provisions  relating  to  such  encumbrance  or  restriction  contained  in  the
applicable agreement referred to in such clause (2), (3), (5), or (6).


                                       51



         SECTION 4.14.  Limitation on Restricted and Unrestricted Subsidiaries

         The Board of  Directors  may,  if no Default or Event of Default  shall
have  occurred  and  be  continuing  or  would  arise  therefrom,  designate  an
Unrestricted Subsidiary to be a Restricted Subsidiary;  provided,  however, that
(i) any such redesignation shall be deemed to be an incurrence as of the date of
such  redesignation  by the  Company  and  its  Restricted  Subsidiaries  of the
Indebtedness  (if any) of such  redesignated  Subsidiary for purposes of Section
4.12, (ii) unless such  redesignated  Subsidiary shall not have any Indebtedness
outstanding,  other than Indebtedness which would be Permitted Indebtedness,  no
such designation  shall be permitted if immediately  after giving effect to such
redesignation and the incurrence of any such additional Indebtedness the Company
could  not  incur  $1.00  of  additional   Indebtedness  (other  than  Permitted
Indebtedness)  pursuant  to Section  4.12 and (iii) such  Subsidiary  assumes by
execution of a  supplemental  indenture all of the  obligations  of a Subsidiary
Guarantor under a Guarantee.

         The Board of  Directors of the Company also may, if no Default or Event
of Default  shall have  occurred  and be  continuing  or would arise  therefrom,
designate any Restricted Subsidiary to be an Unrestricted Subsidiary if (i) such
designation  is at that time permitted  under Section 4.10 and (ii)  immediately
after  giving  effect to such  designation,  the  Company  could  incur $1.00 of
additional  Indebtedness (other than Permitted Indebtedness) pursuant to Section
4.12. Any such  designation by the Board of Directors  shall be evidenced to the
Trustee by the filing with the Trustee of a certified  copy of the resolution of
the Board of Directors giving effect to such designation or redesignation and an
Officers' Certificate certifying that such designation or redesignation complied
with the  foregoing  conditions  and  setting  forth in  reasonable  detail  the
underlying  calculations.  In  the  event  that  any  Restricted  Subsidiary  is
designated an Unrestricted Subsidiary in accordance with this Section 4.14, such
Restricted Subsidiary's Guarantee will be released.

         For purposes of Section 4.10,  (i) an  "Investment"  shall be deemed to
have  been  made at the time  any  Restricted  Subsidiary  is  designated  as an
Unrestricted  Subsidiary in an amount  (proportionate  to the  Company's  equity
interest  in  such  Subsidiary)  equal  to the  net  worth  of  such  Restricted
Subsidiary  at the time that such  Restricted  Subsidiary  is  designated  as an
Unrestricted Subsidiary; (ii) at any date the aggregate amount of all Restricted
Payments made as  Investments  since the Issue Date shall exclude and be reduced
by an amount (proportionate to the Company's equity interest in such Subsidiary)
equal to the net  worth of any  Unrestricted  Subsidiary  at the time  that such
Unrestricted Subsidiary is designated a Restricted Subsidiary, not to exceed, in
the case of any such redesignation of an Unrestricted Subsidiary as a Restricted
Subsidiary,  the amount of  Investments  previously  made by the Company and the
Restricted  Subsidiaries in such  Unrestricted  Subsidiary (in each case (i) and
(ii) "net worth" to be calculated based upon the fair market value of the assets


                                       52


of such Subsidiary as of any such date of  designation);  and (iii) any property
transferred to or from an  Unrestricted  Subsidiary  shall be valued at its fair
market value at the time of such transfer.

         Notwithstanding the foregoing, the Board of Directors may not designate
any  Subsidiary of the Company to be an  Unrestricted  Subsidiary if, after such
designation,  (a) the Company or any Restricted  Subsidiary (i) provides  credit
support for, or a guarantee of, any  Indebtedness of such Subsidiary  (including
any undertaking,  agreement or instrument  evidencing such Indebtedness) or (ii)
is directly or indirectly  liable for any Indebtedness of such Subsidiary or (b)
such  Subsidiary  owns any  Capital  Stock  of, or owns or holds any Lien on any
property  of,  any  Restricted  Subsidiary  which  is  not a  Subsidiary  of the
Subsidiary to be so designated.

         Notwithstanding the foregoing,  the provisions set forth above will not
prohibit the initial  designation of each of Cascade and Western as Unrestricted
Subsidiaries.

         Subsidiaries  of the Company  that are not  designated  by the Board of
Directors  as  Restricted  or  Unrestricted  Subsidiaries  will be  deemed to be
Restricted  Subsidiaries.  Notwithstanding  any provisions of this Section 4.14,
all   Subsidiaries   of  an   Unrestricted   Subsidiary   will  be  Unrestricted
Subsidiaries.

         SECTION 4.15.  Change of Control

         (a) Upon the  occurrence of a Change of Control,  each Holder will have
the right to  require  that the  Issuers  repurchase  all or a  portion  of such
Holder's Notes  (including any Additional  Series D Notes) pursuant to the offer
described  below (the "Change of Control  Offer"),  at a purchase price equal to
101% of the principal amount thereof plus accrued and unpaid  interest,  if any,
thereon to the date of purchase.

         (b) Within 30 days  following the date upon which the Change of Control
occurred, the Issuers must send, by first class mail, a notice to each Holder at
such Holder's last registered address, with a copy to the Trustee,  which notice
shall govern the terms of the Change of Control Offer. The notice to the Holders
shall contain all instructions and materials necessary to enable such Holders to
tender Notes pursuant to the Change of Control Offer. Such notice shall state:

                    (i) that the Change of Control  Offer is being made pursuant
         to this Section 4.15, that all Notes tendered and not withdrawn will be
         accepted for payment and that the Change of Control  Offer shall remain
         open for a period of 20 Business  Days or such longer  period as may be
         required by law;

                   (ii) the  purchase  price  (including  the  amount of accrued
         interest) and the purchase date (which shall be no earlier than 30 days
         nor later than 45 days from the date such notice is mailed,  other than
         as may be required by law) (the "Change of Control Payment Date");


                                       53


                  (iii)  that any Note not  tendered  will  continue  to  accrue
interest;

                   (iv) that,  unless  the  Issuers  default  in making  payment
         therefor,  any Note  accepted  for  payment  pursuant  to the Change of
         Control  Offer  shall  cease to accrue  interest  after  the  Change of
         Control Payment Date;

                    (v) that Holders electing to have a Note purchased  pursuant
         to a Change of Control  Offer will be required to  surrender  the Note,
         with the form  entitled  "Option  of Holder to Elect  Purchase"  on the
         reverse  of the Note  completed,  to the  Paying  Agent at the  address
         specified  in the notice  prior to the close of  business  on the third
         Business Day prior to the Change of Control Payment Date;

                   (vi) that Holders will be entitled to withdraw their election
         if the Paying Agent  receives,  not later than the second  Business Day
         prior to the  Change  of  Control  Payment  Date,  a  telegram,  telex,
         facsimile  transmission or letter setting forth the name of the Holder,
         the principal amount of the Notes the Holder delivered for purchase and
         a statement that such Holder is  withdrawing  his election to have such
         Notes purchased;

                  (vii) that Holders whose Notes are purchased only in part will
         be issued  new Notes in a  principal  amount  equal to the  unpurchased
         portion of the Notes  surrendered;  provided,  however,  that each Note
         purchased  and each new Note issued  shall be in an original  principal
         amount of $1,000 or integral multiples thereof; and

                 (viii) the  circumstances  and relevant  facts  regarding  such
Change of Control.

         On or before the Change of Control  Payment Date, the Issuers shall (i)
accept for payment Notes or portions thereof tendered  pursuant to the Change of
Control  Offer,  (ii) deposit with the Paying Agent in  accordance  with Section
2.14 U.S.  Legal  Tender  sufficient  to pay the  purchase  price  plus  accrued
interest,  if any,  of all Notes so  tendered  and (iii)  deliver to the Trustee
Notes so accepted  together with an Officers'  Certificate  stating the Notes or
portions  thereof  being  purchased by the  Issuers.  Upon receipt by the Paying
Agent of the monies  specified in clause (ii) above and a copy of the  Officers'
Certificate  specified in clause (iii)  above,  the Paying Agent shall  promptly
mail to the  Holders  of Notes so  accepted  payment  in an amount  equal to the
purchase  price plus accrued  interest,  if any, and the Trustee shall  promptly
authenticate and mail to such Holders new Notes equal in principal amount to any
unpurchased portion of the Notes surrendered. Any Notes not so accepted shall be
promptly  mailed by the  Company to the Holder  thereof.  For  purposes  of this
Section 4.15, the Trustee shall act as the Paying Agent.

                                       54


         The Issuers  shall not be  required  to make a Change of Control  Offer
upon a Change of Control if a third party  makes the Change of Control  Offer at
the  Change of  Control  Purchase  Price,  at the same  times and  otherwise  in
compliance with the requirements applicable to a Change of Control Offer made by
the Issuers and  purchases all Notes  validly  tendered and not withdrawn  under
such Change of Control Offer.

         Neither the Board of Directors of the Company nor the Trustee may waive
the provisions of this Section 4.15 relating to the Issuers'  obligation to make
a Change of Control Offer.

         The Issuers will comply with the  requirements  of Rule 14e-1 under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent  such  laws  and  regulations  are  applicable  in  connection  with  the
repurchase of Notes  pursuant to a Change of Control  Offer.  To the extent that
the  provisions  of  any  securities  laws  or  regulations  conflict  with  the
provisions  of this Section 4.15,  the Issuers shall comply with the  applicable
securities  laws and  regulations and shall not be deemed to have breached their
obligations under the provisions of this Section 4.15 by virtue thereof.

         SECTION 4.16.  Limitation on Asset Sales

         (a) The  Company  will not,  and will not  cause or  permit  any of its
Restricted Subsidiaries to, consummate an Asset Sale unless:

                    (i) the Company or the applicable Restricted Subsidiary,  as
         the case may be, receives  consideration at the time of such Asset Sale
         at least equal to the fair market value of the assets sold or otherwise
         disposed  of (as  determined  in good faith by the  Company's  Board of
         Directors or senior management of the Company);

                   (ii) (a) at least 70% of the  consideration  received  by the
         Company or the  Restricted  Subsidiary,  as the case may be,  from such
         Asset  Sale  shall  be in the form of cash or Cash  Equivalents  and is
         received at the time of such  disposition  and (b) at least 15% of such
         consideration received if in a form other than cash or Cash Equivalents
         is converted into or exchanged for cash or Cash Equivalents  within 120
         days of such disposition; and

                  (iii) upon the  consummation  of an Asset  Sale,  the  Company
         shall apply, or cause such Restricted Subsidiary to apply, the Net Cash
         Proceeds relating to such Asset Sale within 365 days of receipt thereof
         either (a) to repay or prepay Indebtedness outstanding under the Credit
         Facility,  including,  without limitation, a permanent reduction in the
         related  commitment,  (b) to repay or prepay  any  Indebtedness  of the
         Company that is secured by a Lien permitted to be incurred  pursuant to
         Section  4.18,  (c) to make an  investment in properties or assets that
         replace  the  properties  or assets that were the subject of such Asset

                                       55


         Sale or in  properties  or assets that will be used in the  business of
         the Company and its Restricted  Subsidiaries  as existing on the Series
         A/B  Issue   Date  or  in   businesses   reasonably   related   thereto
         ("Replacement  Assets"),  (d) to an investment in Crude Oil and Natural
         Gas Related  Assets or (e) a combination  of prepayment  and investment
         permitted by the foregoing  clauses (iii)(a) through  (iii)(d).  On the
         366th day after an Asset  Sale or such  earlier  date,  if any,  as the
         Board of Directors of the Company  determines not to apply the Net Cash
         Proceeds  relating to such Asset Sale as set forth in clauses  (iii)(a)
         through  (iii)(d) of the next preceding  sentence (each a "Net Proceeds
         Offer Trigger Date"),  such aggregate amount of Net Cash Proceeds which
         have been  received by the Company or such  Restricted  Subsidiary  but
         which  have not been  applied  on or  before  such Net  Proceeds  Offer
         Trigger Date as permitted in clauses  (iii)(a)  through (iii)(d) of the
         next  preceding  sentence  (each  an  "Unadjusted  Net  Proceeds  Offer
         Amount"),  multiplied by the ratio (the "Net Proceeds Offer  Adjustment
         Ratio") of the then  outstanding  principal  amount of the Notes to the
         sum of the then  outstanding  principal  amount of the Series A/B Notes
         plus the then  outstanding  principal  amount of the Notes (each a "Net
         Proceeds  Offer  Amount")  shall  be  applied  by the  Company  or such
         Restricted Subsidiary, as the case may be, to make an offer to purchase
         (a "Net  Proceeds  Offer") on a date (the "Net  Proceeds  Offer Payment
         Date") not less than 30 nor more than 45 days  following the applicable
         Net Proceeds Offer Trigger Date,  from all Holders on a pro rata basis,
         that principal amount of Notes  purchasable with the Net Proceeds Offer
         Amount at a price equal to 100% of the principal amount of the Notes to
         be purchased,  plus accrued and unpaid interest, if any, thereon to the
         date of purchase;  provided,  however, that if at any time any non-cash
         consideration received by the Company or any Restricted Subsidiary,  as
         the case may be, in connection with any Asset Sale is converted into or
         sold or otherwise  disposed of for cash (other than  interest  received
         with respect to any such non-cash consideration),  then such conversion
         or  disposition  shall be deemed to constitute an Asset Sale  hereunder
         and the Net Cash Proceeds  thereof shall be applied in accordance  with
         this Section 4.16.  The Company may defer the Net Proceeds  Offer until
         the sum of the  Unadjusted Net Proceeds Offer Amounts that correlate to
         the unutilized  Net Proceeds  Offer Amounts  resulting from one or more
         Asset Sales are equal to or in excess of $5,000,000 (at which time, the
         entire  unutilized Net Proceeds Offer Amounts  (recalculated  using the
         then current Net Proceeds Offer Adjustment Ratio), and not just the Net
         Proceeds Offer Amounts correlating to the Unadjusted Net Proceeds Offer
         Amounts in excess of $5,000,000,  shall be applied as required pursuant
         to this paragraph).

         In the event of the transfer of substantially  all (but not all) of the
property  and  assets  of the  Company  and its  Restricted  Subsidiaries  as an
entirety  to a  Person  in a  transaction  permitted  under  Section  5.01,  the
successor  corporation shall be deemed to have sold the properties and assets of
the Company and its Restricted  Subsidiaries  not so transferred for purposes of
this Section  4.16,  and shall comply with the  provisions  of this Section 4.16

                                       56


with respect to such deemed sale as if it were an Asset Sale.  In addition,  the
fair market value of such properties and assets of the Company or its Restricted
Subsidiaries  deemed  to be sold  shall be deemed  to be Net Cash  Proceeds  for
purposes of this Section 4.16.

         Notwithstanding the two immediately preceding  paragraphs,  the Company
and its  Restricted  Subsidiaries  will be permitted to consummate an Asset Sale
without  complying with such paragraphs to the extent (a) the  consideration for
such Asset Sale constitutes  Replacement Assets and/or Crude Oil and Natural Gas
Related  Assets  and (b) such  Asset Sale is for fair  market  value;  provided,
however,  that any consideration not constituting  Replacement  Assets and Crude
Oil and  Natural  Gas  Related  Assets  received  by the  Company  or any of its
Restricted  Subsidiaries  in  connection  with any Asset  Sale  permitted  to be
consummated  under this paragraph shall  constitute Net Cash Proceeds subject to
the provisions of the two immediately preceding paragraphs.

         (b) Subject to the  deferral of the Net  Proceeds  Offer  contained  in
clause  (a)(iii)  above,  each notice of a Net Proceeds  Offer  pursuant to this
Section 4.16 shall be mailed or caused to be mailed, by first class mail, by the
Issuers not more than 30 days after the Net Proceeds  Offer  Trigger Date to all
Holders at their last  registered  addresses,  with a copy to the  Trustee.  The
notice shall contain all  instructions  and  materials  necessary to enable such
Holders to tender Notes  pursuant to the Net Proceeds  Offer and shall state the
following terms:

                    (i) that the Net  Proceeds  Offer is being made  pursuant to
         Section 4.16, that all Notes (including any Additional  Series D Notes)
         tendered will be accepted for payment;  provided,  however, that if the
         aggregate  principal amount of Notes (including any Additional Series D
         Notes)  tendered in a Net Proceeds  Offer plus accrued  interest at the
         expiration  of such  offer  exceeds  the  aggregate  amount  of the Net
         Proceeds  Offer,  the Issuers  shall  select the Notes  (including  any
         Additional  Series D Notes) to be  purchased  on a pro rata basis (with
         such  adjustments  as may be deemed  appropriate by the Issuers so that
         only Notes in  denominations  of $1,000 or multiples  thereof  shall be
         purchased)  and that the Net  Proceeds  Offer  shall  remain open for a
         period of 20 Business  Days or such longer period as may be required by
         law;

                   (ii) the  purchase  price  (including  the  amount of accrued
         interest)  and the Net Proceeds  Offer Payment Date (which shall be not
         less  than 30 nor  more  than  45 days  following  the  applicable  Net
         Proceeds  Offer  Trigger Date and which shall be at least five business
         days after the Trustee receives notice thereof from the Issuers);

                  (iii)  that any Note not  tendered  will  continue  to  accrue
interest;

                   (iv) that,  unless  the  Issuers  default  in making  payment
         therefor,  any Note  accepted for payment  pursuant to the Net Proceeds

                                       57


         Offer  shall  cease to accrue  interest  after the Net  Proceeds  Offer
         Payment Date;

                    (v) that Holders electing to have a Note purchased  pursuant
         to a Net Proceeds  Offer will be required to surrender  the Note,  with
         the form entitled  "Option of Holder to Elect  Purchase" on the reverse
         of the Note completed,  to the Paying Agent at the address specified in
         the notice  prior to the close of  business on the third  Business  Day
         prior to the Net Proceeds Offer Payment Date;

                   (vi) that Holders will be entitled to withdraw their election
         if the Paying Agent  receives,  not later than the second  Business Day
         prior to the Net  Proceeds  Offer  Payment  Date,  a  telegram,  telex,
         facsimile  transmission or letter setting forth the name of the Holder,
         the principal amount of the Notes the Holder delivered for purchase and
         a statement that such Holder is  withdrawing  his election to have such
         Note purchased; and

                  (vii) that Holders whose Notes are purchased only in part will
         be issued  new Notes in a  principal  amount  equal to the  unpurchased
         portion of the Notes  surrendered;  provided,  however,  that each Note
         purchased  and each new Note issued  shall be in an original  principal
         amount of $1,000 or integral multiples thereof;

         On or before the Net Proceeds Offer Payment Date, the Issuers shall (i)
accept for payment Notes  (including any Additional  Series D Notes) or portions
thereof tendered pursuant to the Net Proceeds Offer which are to be purchased in
accordance  with item  (b)(i)  above,  (ii)  deposit  with the  Paying  Agent in
accordance  with Section 2.14 U.S.  Legal Tender  sufficient to pay the purchase
price plus  accrued  interest,  if any, of all Notes to be  purchased  and (iii)
deliver to the Trustee Notes so accepted together with an Officers'  Certificate
stating the Notes or portions thereof being purchased by the Issuers. The Paying
Agent shall  promptly  mail to the  Holders of Notes so  accepted  payment in an
amount equal to the purchase price plus accrued  interest,  if any. For purposes
of this Section 4.16, the Trustee shall act as the Paying Agent.

         The Issuers will comply with the  requirements  of Rule 14e-1 under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent  such  laws  and  regulations  are  applicable  in  connection  with  the
repurchase  of Notes  pursuant to a Net Proceeds  Offer.  To the extent that the
provisions of any securities laws or regulations conflict with the provisions of
this Section 4.16, the Issuers shall comply with the applicable  securities laws
and regulations and shall not be deemed to have breached their obligations under
the provisions of this Section 4.16 by virtue thereof.

         SECTION 4.17.  Limitation on Preferred Stock of Restricted Subsidiaries

         The Company will not cause or permit any of its Restricted Subsidiaries

                                       58


to issue any  Preferred  Stock  (other than to the Company or to a Wholly  Owned
Restricted  Subsidiary) or permit any Person (other than the Company or a Wholly
Owned  Restricted  Subsidiary)  to own any  Preferred  Stock  of any  Restricted
Subsidiary.

         SECTION 4.18.  Limitation on Liens

         Other than Permitted Liens, the Company will not, and will not cause or
permit any of its Restricted  Subsidiaries  to, directly or indirectly,  create,
incur, assume or permit or suffer to exist any Liens of any kind against or upon
any  property  or assets of the  Company or any of its  Restricted  Subsidiaries
(whether  owned on the Issue  Date or  acquired  after  the  Issue  Date) or any
proceeds therefrom, or assign or otherwise convey any right to receive income or
profits therefrom unless (a) in the case of Liens securing  Indebtedness that is
expressly  subordinate  or  junior  in  right  of  payment  to the  Notes or any
Guarantee,  the Notes or such  Guarantee,  as the case may be, are  secured by a
Lien on such  property,  assets or  proceeds  that is senior in priority to such
Liens at least to the same  extent as the Notes are senior in  priority  to such
Indebtedness  and (b) in all  other  cases,  the Notes  and the  Guarantees  are
equally and ratably secured.

         SECTION 4.19.  Limitation on Conduct of Business

         The  Company  will  not,  and will  not  permit  any of its  Restricted
Subsidiaries  to, engage in the conduct of any business other than the Crude Oil
and Natural Gas Business.

         SECTION 4.20.  Additional Subsidiary Guarantees

         If the  Company  or any of its  Restricted  Subsidiaries  transfers  or
causes  to  be   transferred,   in  one  transaction  or  a  series  of  related
transactions, any property to any Restricted Subsidiary that is not a Subsidiary
Guarantor,  or if  the  Company  or any of  its  Restricted  Subsidiaries  shall
organize,  acquire  or  otherwise  invest in or hold an  Investment  in  another
Restricted  Subsidiary  having  total  consolidated  assets with a book value in
excess of $500,000 that is not a Subsidiary  Guarantor,  then such transferee or
acquired  or other  Restricted  Subsidiary  shall (a) execute and deliver to the
Trustee a supplemental indenture in form reasonably  satisfactory to the Trustee
pursuant to which such Restricted Subsidiary shall unconditionally guarantee all
of the Company's obligations under the Notes and this Indenture on the terms set
forth in this Indenture and (b) deliver to the Trustee an Opinion of Counsel and
an  Officers'  Certificate,  stating  that no event of default  shall occur as a
result of such supplemental  indenture,  that it complies with the terms of this
Indenture  and  that  such  supplemental  indenture  has been  duly  authorized,
executed and delivered by such  Restricted  Subsidiary and  constitutes a legal,
valid,  binding  and  enforceable  obligation  of  such  Restricted  Subsidiary.
Thereafter,  such Restricted  Subsidiary shall be a Subsidiary Guarantor for all
purposes of the Indenture.

                                       59


         SECTION 4.21.  Limitation on Restrictive Covenants

         Notwithstanding any other provisions of this Indenture, the restrictive
covenants  set forth herein for so long as the Series A/B  Indenture  remains in
effect, shall be and shall be deemed limited to the extent necessary so that the
creation,  existence and  effectiveness of such  restrictive  covenant shall not
result in a breach of the  covenant  of the Series  A/B  Indenture  relating  to
"Limitation  on Dividend and Other  Payment  Restrictions  Affecting  Restricted
Subsidiaries."


                                  ARTICLE FIVE

                              SUCCESSOR CORPORATION


         SECTION 5.1.  Merger, Consolidation and Sale of Assets

         The  Company  will not,  in a single  transaction  or series of related
transactions,  consolidate  or merge with or into any Person,  or sell,  assign,
transfer,  lease,  convey  or  otherwise  dispose  of (or  cause or  permit  any
Restricted  Subsidiary to sell,  assign,  transfer,  lease,  convey or otherwise
dispose of) all or substantially  all of the Company's  assets  (determined on a
consolidated basis for the Company and its Restricted Subsidiaries),  whether as
an entirety or substantially as an entirety to any Person unless: (a) either (i)
the  Company or such  Restricted  Subsidiary,  as the case may be,  shall be the
surviving  or  continuing  corporation  or (ii) the  Person  (if other  than the
Company) formed by such consolidation or into which the Company is merged or the
Person which acquires by sale, assignment,  transfer, lease, conveyance or other
disposition  the  properties  and  assets  of the  Company  and  its  Restricted
Subsidiaries  substantially as an entirety (the "Surviving Entity") (x) shall be
a corporation organized and validly existing under the laws of the United States
or any state thereof or the District of Columbia and (y) shall expressly assume,
by supplemental  indenture (in form and substance  satisfactory to the Trustee),
executed  and  delivered to the  Trustee,  the due and  punctual  payment of the
principal  of,  premium,  if  any,  and  interest  on all of the  Notes  and the
performance of every covenant of the Notes,  the Indenture and the  Registration
Rights  Agreement on the part of the Company to be  performed  or observed;  (b)
immediately   after  giving  effect  to  such  transaction  and  the  assumption
contemplated  by  clause  (a)(ii)(y)  above  (including  giving  effect  to  any
Indebtedness  incurred or  anticipated  to be incurred in connection  with or in
respect of such transaction),  the Company or such Surviving Entity, as the case
may be, (i) shall have a  Consolidated  Net Worth  equal to or greater  than the
Consolidated Net Worth of the Company  immediately prior to such transaction and
(ii) shall be able to incur at least  $1.00 of  additional  Indebtedness  (other
than Permitted  Indebtedness)  pursuant to Section 4.12 hereof;  (c) immediately
before  and  immediately  after  giving  effect  to  such  transaction  and  the
assumption   contemplated  by  clause  (a)(ii)(y)  above   (including,   without
limitation,  giving effect to any  Indebtedness  incurred or  anticipated  to be

                                       60


incurred  and  any  Lien  granted  in  connection  with  or in  respect  of  the
transaction),  no  Default  or  Event  of  Default  shall  have  occurred  or be
continuing;  and (d) the Company or the  Surviving  Entity,  as the case may be,
shall have delivered to the Trustee an officers'  certificate  and an opinion of
counsel,  each  stating  that  such  consolidation,  merger,  sale,  assignment,
transfer,  lease,  conveyance  or  other  disposition  and,  if  a  supplemental
indenture is required in connection  with such  transaction,  such  supplemental
indenture comply with the applicable  provisions  hereof and that all conditions
precedent in this Indenture  relating to such  transaction  have been satisfied;
provided,  however,  that such  counsel  may rely,  as to matters of fact,  on a
certificate or certificates of officers of the Company.

         For purposes of the foregoing, the transfer (by lease, assignment, sale
or  otherwise,  in a single  transaction  or series of  transactions)  of all or
substantially  all of the  properties  or  assets  of  one  or  more  Restricted
Subsidiaries the Capital Stock of which  constitutes all or substantially all of
the properties and assets of the Company,  shall be deemed to be the transfer of
all or substantially all of the properties and assets of the Company.

         Each Subsidiary  Guarantor  (other than any Subsidiary  Guarantor whose
Guarantee is to be released in  accordance  with the terms of the  Guarantee and
this Indenture in connection with any transaction  complying with the provisions
of the  Indenture  described  under Article Five) will not, and the Company will
not cause or permit any Subsidiary  Guarantor to, consolidate with or merge with
or into any Person other than the Company or another  Subsidiary  Guarantor that
is a Wholly Owned  Restricted  Subsidiary  unless:  (a) the entity  formed by or
surviving  any such  consolidation  or  merger  (if  other  than the  Subsidiary
Guarantor) or to which such sale,  lease,  conveyance or other disposition shall
have been made is a  corporation  organized  and existing  under the laws of the
United States or any state thereof or the District of Columbia;  (b) such entity
assumes by execution of a supplemental  indenture all of the  obligations of the
Subsidiary Guarantor under its Guarantee; (c) immediately after giving effect to
such  transaction,  no Default or Event of Default  shall have  occurred  and be
continuing;  and (d) immediately after giving effect to such transaction and the
use of any net  proceeds  therefrom  on a pro forma  basis,  the  Company  could
satisfy the  provisions of clause (b) of the first  paragraph of this  covenant.
Any merger or consolidation of a Subsidiary  Guarantor with and into the Company
(with the Company being the surviving  entity) or another  Subsidiary  Guarantor
that is a Wholly Owned Restricted Subsidiary need only comply with clause (d) of
the first paragraph of this Section 5.01.

         SECTION 5.02.  Successor Corporation Substituted

         Upon  any  consolidation,  merger,  conveyance,  lease or  transfer  in
accordance with Section 5.01, the successor Person formed by such  consolidation
or into  which  the  Company  is merged or to which  such  conveyance,  lease or
transfer is made shall  succeed to, and be  substituted  for,  and may  exercise
every right and power of, the Company under this  Indenture with the same effect

                                       61


as if such successor had been named as the Company herein and thereafter (except
in the case of a lease) the  predecessor  corporation  will be  relieved  of all
further obligations and covenants under this Indenture and the Notes.


                                   ARTICLE SIX

                                    REMEDIES

         SECTION 6.01.  Events of Default

         An "Event of Default" means any of the following events:

                  (a) the  failure to pay  interest  (including  any  Additional
         Interest)  on any Notes when the same  becomes due and payable and such
         default continues for a period of 30 days;

                  (b) the  failure to pay the  principal  of any Notes when such
         principal  becomes due and payable,  at maturity,  upon  redemption  or
         otherwise  (including  the failure to make a payment to purchase  Notes
         tendered  pursuant  to a Change  of  Control  Offer  or a Net  Proceeds
         Offer);

                  (c) a default in the  observance or  performance  of any other
         covenant  or  agreement  contained  in  this  Indenture  which  default
         continues  for a period of 30 days after  either  Issuer or  Subsidiary
         Guarantor receives written notice specifying the default (and demanding
         that such  default be  remedied)  from the Trustee or the Holders of at
         least 25% of the outstanding  principal  amount of the Notes (except in
         the case of a default with respect to observance or  performance of any
         of the terms or  provisions  of Section  4.15,  4.16 or 5.01 which will
         constitute an Event of Default with such notice requirement but without
         such passage of time requirement);

                  (d) a default  under any  mortgage,  indenture  or  instrument
         under  which  there may be issued or by which  there may be  secured or
         evidenced any Indebtedness of the Company or any Restricted  Subsidiary
         (or the payment of which is guaranteed by the Issuers or any Restricted
         Subsidiary),  whether such Indebtedness now exists, or is created after
         the Issue  Date,  which  default  (i) is  caused  by a  failure  to pay
         principal of or premium, if any, or interest on such Indebtedness after
         any applicable  grace period provided in such  Indebtedness (a "Payment
         Default")  or (ii)  results in the  acceleration  of such  Indebtedness
         prior to its express  maturity and, in each case, the principal  amount
         of any such  Indebtedness,  together with the  principal  amount of any
         other such Indebtedness under which there has been a Payment Default or
         the maturity of which has been so accelerated, aggregates $5,000,000 or
         more;



                                       62


                  (e) one or more judgments in an aggregate  amount in excess of
         $5,000,000  (unless  covered by insurance by a reputable  insurer as to
         which the insurer has  acknowledged  coverage) shall have been rendered
         against  the  Company or any of its  Restricted  Subsidiaries  and such
         judgments  remain  undischarged,  unvacated,  unpaid or unstayed  for a
         period of 60 days after such  judgment or  judgments  become  final and
         non-appealable;

                  (f) the  Company  or any of its  Subsidiaries  pursuant  to or
         under or within the meaning of any Bankruptcy Law:

                             (i) commences a voluntary case or proceeding;

                             (ii)  consents  to the entry of an order for relief
                  against it in an involuntary case or proceeding;

                             (iii) consents to the appointment of a Custodian of
                  it or for all or substantially all of its property;

                             (iv) makes a general  assignment for the benefit of
                  its creditors; or

                             (v) shall  generally  not pay its  debts  when such
                  debts  become due or shall admit in writing its  inability  to
                  pay its debts generally;

                  (g) a court  of  competent  jurisdiction  enters  an  order or
         decree under any Bankruptcy Law that:

                             (i)  is  for  relief  against  the  Company  or any
                  Subsidiary   of  the  Company  in  an   involuntary   case  or
                  proceeding,

                             (ii)  appoints a  Custodian  of the  Company or any
                  Subsidiary of the Company for all or substantially  all of its
                  Properties, or

                             (iii) orders the  liquidation of the Company or any
                  Subsidiary of the Company,

         and in each case the order or decree remains unstayed and in effect for
         60 days; or

                  (h) any of the Guarantees cease to be in full force and effect
         or any of the  Guarantees  are  declared to be null and void or invalid
         and  unenforceable  or any  of  the  Subsidiary  Guarantors  denies  or
         disaffirms its liability under its Guarantees  (other than by reason of
         release of a Subsidiary  Guarantor in accordance with the terms of this
         Indenture).

                                       63


         SECTION 6.02.  Acceleration

         Upon the  happening  of any Event of Default  specified in Section 6.01
the Trustee may, or the holders of at least 25% in aggregate principal amount of
outstanding  Notes may,  declare the principal of, premium,  if any, and accrued
and unpaid  interest on all the Notes to be due and payable by notice in writing
to the Issuers and the Trustee  specifying the  respective  Event of Default and
that it is a "notice of acceleration" and the same shall become  immediately due
and payable.  If an Event of Default of the type  described in clause (f) or (g)
above occurs and is  continuing,  then such amount will ipso facto become and be
immediately  due and payable without any declaration or other act on the part of
the Trustee or any Holder.

         At any time after a  declaration  of  acceleration  with respect to the
Notes as  described  in the  preceding  paragraph,  the Holders of a majority in
aggregate  principal  amount of the Notes then  outstanding by written notice to
the Company and the  Trustee  may  rescind and cancel such  declaration  and its
consequences  (a) if the  rescission  would not  conflict  with any  judgment or
decree,  (b) if all existing  Events of Default have been cured or waived except
nonpayment of principal or interest  that has become due solely  because of such
acceleration, (c) to the extent the payment of such interest is lawful, interest
on overdue installments of interest and overdue principal,  which has become due
otherwise than by such  declaration of  acceleration,  has been paid, (d) if the
Issuers have paid the Trustee its  reasonable  compensation  and  reimbursed the
Trustee for its expenses, disbursements and advances and (e) in the event of the
cure or waiver of an Event of Default of the type described in clause (f) or (g)
of the  description of Events of Default above,  the Trustee shall have received
an  Officers'  Certificate  and an Opinion of Counsel that such Event of Default
has been cured or waived;  provided,  however, that such counsel may rely, as to
matters of fact, on a certificate or certificates of officers of the Company. No
such  rescission  shall  affect  any  subsequent  Default  or  impair  any right
consequent thereto.

         SECTION 6.03.  Other Remedies

         If an Event of Default occurs and is continuing, the Trustee may pursue
any available remedy by proceeding at law or in equity to collect the payment of
the  principal of,  premium,  if any, or interest on the Notes or to enforce the
performance of any provision of the Notes or this Indenture.

         All rights of action and claims  under this  Indenture or the Notes may
be enforced by the Trustee  even if it does not possess any of the Notes or does
not produce any of them in the proceeding. A delay or omission by the Trustee or
any Holder in exercising  any right or remedy  accruing upon an Event of Default
shall not impair the right or remedy or  constitute a waiver of or  acquiescence
in the Event of  Default.  No  remedy is  exclusive  of any  other  remedy.  All
available remedies are cumulative to the extent permitted by law.

                                       64


         SECTION 6.04.  Waiver of Past Defaults

         Prior to the declaration of  acceleration of the Notes,  the Holders of
not less than a  majority  in  aggregate  principal  amount  of the  Notes  then
outstanding  by notice to the  Trustee  may, on behalf of the Holders of all the
Notes, waive any existing Default or Event of Default and its consequences under
this  Indenture,  except a Default  or Event of  Default  specified  in  Section
6.01(a) or (b) or in respect of any provision hereof which cannot be modified or
amended without the consent of the Holder so affected  pursuant to Section 9.02.
When a Default or Event of Default  is so waived,  it shall be deemed  cured and
shall cease to exist. This Section 6.04 shall be in lieu of ss.  316(a)(1)(B) of
the TIA and such ss.  316(a)(1)(B) of the TIA is hereby expressly  excluded from
this Indenture and the Notes, as permitted by the TIA.

         SECTION 6.05.  Control by Majority

         Holders of the Notes may not enforce this Indenture or the Notes except
as provided in this  Article Six and under the TIA. The Holders of not less than
a majority in aggregate principal amount of the outstanding Notes shall have the
right to direct the time,  method and place of conducting any proceeding for any
remedy  available to the Trustee,  or exercising any trust or power conferred on
the  Trustee,  provided,  however,  that the  Trustee  may  refuse to follow any
direction (a) that  conflicts with any rule of law or this  Indenture,  (b) that
the  Trustee  determines  may be unduly  prejudicial  to the  rights of  another
Holder,  or (c) that may expose  the  Trustee to  personal  liability  for which
reasonable  indemnity  provided to the Trustee  against such liability  shall be
inadequate;  provided,  further,  however,  that the  Trustee may take any other
action deemed proper by the Trustee that is not inconsistent with such direction
or this Indenture. This Section 6.05 shall be in lieu of ss. 316(a)(1)(A) of the
TIA, and such ss. 316(a)(1)(A) of the TIA is hereby expressly excluded from this
Indenture and the Notes, as permitted by the TIA.

         SECTION 6.06.  Limitation on Suits

         No Holder of any Notes shall have any right to institute any proceeding
with respect to this Indenture or the Notes or any remedy hereunder,  unless the
Holders of at least 25% in aggregate  principal amount of the outstanding  Notes
have made written request, and offered reasonable  indemnity,  to the Trustee to
institute  such  proceeding as Trustee under the Notes and this  Indenture,  the
Trustee has failed to institute such proceeding  within 30 days after receipt of
such notice, request and offer of indemnity and the Trustee,  within such 30-day
period,  has not received  directions  inconsistent with such written request by
Holders  of not less  than a  majority  in  aggregate  principal  amount  of the
outstanding Notes.

         The  foregoing  limitations  shall not apply to a suit  instituted by a
Holder  of a Note  for the  enforcement  of the  payment  of the  principal  of,

                                       65


premium,  if any, or interest on, such Note on or after the respective due dates
expressed or provided for in such Note.

         A Holder  may not use this  Indenture  to  prejudice  the rights of any
other Holders or to obtain priority or preference over such other Holders.

         SECTION 6.07.  Right of Holders To Receive Payment

         Notwithstanding any other provision in this Indenture, the right of any
Holder of a Note to receive  payment of the principal of,  premium,  if any, and
interest  on such  Note,  on or after  the  respective  due dates  expressed  or
provided  for in such  Note,  or to bring suit for the  enforcement  of any such
payment on or after the respective due dates, is absolute and  unconditional and
shall not be impaired or affected without the consent of the Holder.

         SECTION 6.08.  Collection Suit by Trustee

         If an Event of Default  specified  in clause (a) or (b) of Section 6.01
occurs and is continuing,  the Trustee may recover  judgment in its own name and
as trustee of an express trust against the Company,  or any other obligor on the
Notes for the whole amount of the  principal  of,  premium,  if any, and accrued
interest  remaining unpaid,  together with interest on overdue principal and, to
the  extent  that  payment  of such  interest  is  lawful,  interest  on overdue
installments of interest, in each case at the rate per annum provided for by the
Notes  and such  further  amount as shall be  sufficient  to cover the costs and
expenses  of  collection,  including  the  reasonable  compensation,   expenses,
disbursements and advances of the Trustee, its agents and counsel.

         SECTION 6.09.  Trustee May File Proofs of Claim

         The Trustee may file such proofs of claim and other papers or documents
as may be  necessary  or  advisable  in order to have the claims of the  Trustee
(including any claim for the reasonable  compensation,  expenses,  disbursements
and advances of the Trustee, its agents,  counsel,  accountants and experts) and
the  Holders  allowed in any  judicial  proceedings  relative  to the Issuers or
Restricted  Subsidiaries (or any other obligor upon the Notes),  their creditors
or their property and shall be entitled and empowered to collect and receive any
monies or other  property  payable  or  deliverable  on any such  claims  and to
distribute  the same,  and any  Custodian in any such  judicial  proceedings  is
hereby  authorized  by each Holder to make such  payments to the Trustee and, in
the event that the Trustee shall consent to the making of such payments directly
to the  Holders,  to pay to the Trustee any amount due to it for the  reasonable
compensation, expenses, disbursements and advances of the Trustee, its agent and
counsel,  and any other  amounts due the Trustee  under  Section  7.07.  Nothing
herein  contained  shall be deemed to  authorize  the  Trustee to  authorize  or
consent   to  or  accept  or  adopt  on  behalf  of  any   Holder  any  plan  of
reorganization,  arrangement,  adjustment or composition  affecting the Notes or
the rights of any Holder thereof, or to authorize the Trustee to vote in respect

                                       66


of the claim of any Holder in any such proceeding.

         SECTION 6.10  Priorities

         If the Trustee collects any money pursuant to this Article Six it shall
pay out such money in the following order:

                  First:  to the Trustee for amounts due under Section 7.07;

                  Second: to Holders for interest accrued on the Notes, ratably,
         without  preference  or priority of any kind,  according to the amounts
         due and payable on the Notes for interest;

                  Third:  to Holders for the principal  amounts  (including  any
         premium) owing under the Notes, ratably, without preference or priority
         of any kind,  according to the amounts due and payable on the Notes for
         the principal (including any premium); and

                  Fourth:  the balance, if any, to the Issuers.
         The Trustee, upon prior written notice to the Issuers, may fix a record
date and payment date for any payment to Holders pursuant to this Section 6.10.

         SECTION 6.11.  Undertaking for Costs

         In any suit for the  enforcement  of any  right or  remedy  under  this
Indenture  or in any suit against the Trustee for any action taken or omitted by
it as  Trustee,  a court may in its  discretion  require the filing by any party
litigant  in the suit of an  undertaking  to pay the costs of the suit,  and the
court in its  discretion  may  assess  reasonable  costs,  including  reasonable
attorneys'  fees,  against any party litigant in the suit,  having due regard to
the merits and good faith of the claims or defenses made by the party  litigant.
This  Section  6.11  does not  apply to any suit by the  Trustee,  any suit by a
Holder  pursuant to Section  6.06, or a suit by a Holder or Holders of more than
10% in aggregate principal amount of the outstanding Notes.

         SECTION 6.12.  Restoration of Rights and Remedies

         If the Trustee or any Holder has  instituted  any proceeding to enforce
any right or remedy  under this  Indenture or any Note and such  proceeding  has
been discontinued or abandoned for any reason, or has been determined  adversely
to the Trustee or to such Holder,  then and in every such case the Issuers,  the
Trustee and the Holders shall,  subject to any determination in such proceeding,
be restored severally and respectively to their former positions hereunder,  and
thereafter all rights and remedies of the Trustee and the Holders shall continue
as though no such proceeding had been instituted.

                                       67



                                  ARTICLE SEVEN

                                     TRUSTEE

         SECTION 7.01.  Duties of Trustee

         (a) If an Event of Default has occurred and is continuing,  the Trustee
shall  exercise such of the rights and powers vested in it by this Indenture and
use the same  degree  of care and  skill in its  exercise  thereof  as a prudent
person would exercise or use under the  circumstances  in the conduct of his own
affairs.

         (b) Except during the continuance of an Event of Default:

                  (1)  The  Trustee  need  perform  only  those  duties  as  are
         specifically   set  forth  in  this   Indenture  and  no  covenants  or
         obligations  shall be implied in this Indenture that are adverse to the
         Trustee.

                  (2) In the  absence of bad faith on its part,  the Trustee may
         conclusively   rely,  as  to  the  truth  of  the  statements  and  the
         correctness of the opinions  expressed  therein,  upon  certificates or
         opinions furnished to the Trustee and conforming to the requirements of
         this  Indenture.  However,  in the  case of any  such  certificates  or
         opinions that by any provision hereof are  specifically  required to be
         furnished to the Trustee,  the Trustee shall  examine the  certificates
         and  opinions  to  determine   whether  or  not  they  conform  to  the
         requirements of this Indenture.

         (c)  Notwithstanding  anything to the contrary  herein  contained,  the
Trustee may not be relieved from liability for its own negligent action, its own
negligent failure to act, or its own willful misconduct, except that:

                  (1) This  paragraph does not limit the effect of paragraph (b)
of this Section 7.01.

                  (2) The Trustee  shall not be liable for any error of judgment
         made in good  faith by a Trust  Officer,  unless it is proved  that the
         Trustee was negligent in ascertaining the pertinent facts.

                  (3) The Trustee shall not be liable with respect to any action
         it takes or omits to take in good faith in accordance  with a direction
         received by it pursuant to Section 6.02, 6.04 or 6.05.

         (d) No provision of this Indenture  shall require the Trustee to expend
or risk  its own  funds  or  otherwise  incur  any  financial  liability  in the
performance  of any of its duties  hereunder  or in the  exercise  of any of its
rights  or  powers  if it shall  have  reasonable  grounds  for  believing  that

                                       68


repayment of such funds or adequate  indemnity against such risk or liability is
not reasonably assured to it.

         (e) Every  provision of this  Indenture  that in any way relates to the
Trustee is subject to paragraphs  (a), (b), (c) and (d) of this Section 7.01 and
Section 7.02.

         (f) The Trustee shall not be liable for interest on any money or assets
received  by it except as the  Trustee  may agree in writing  with the  Issuers.
Assets held in trust by the Trustee  need not be  segregated  from other  assets
except to the extent required by law.

         SECTION 7.02.  Rights of Trustee

         Subject to Section 7.01:

                  (a) The  Trustee  may rely and  shall  be fully  protected  in
         acting or refraining from acting upon any document believed by it to be
         genuine and to have been signed or presented by the proper Person.  The
         Trustee need not investigate any fact or matter stated in the document.

                  (b) Before the Trustee acts or refrains  from  acting,  it may
         consult  with  counsel of its  selection  and may require an  Officers'
         Certificate  or an Opinion of Counsel,  which shall conform to Sections
         10.04 and  10.05.  The  Trustee  shall not be liable  for any action it
         takes or omits to take in good  faith  in  reliance  on such  Officers'
         Certificate or Opinion of Counsel.

                  (c) The Trustee may act through its  attorneys  and agents and
         shall not be responsible  for the misconduct or negligence of any agent
         appointed with due care.

                  (d) The  Trustee  shall not be liable for any  action  that it
         takes or omits to take in good faith which it reasonably believes to be
         authorized or within its rights or powers.

                  (e) The Trustee  shall not be bound to make any  investigation
         into the  facts  or  matters  stated  in any  resolution,  certificate,
         statement,  instrument,  opinion, notice, request, direction,  consent,
         order, bond, debenture, or other paper or document, but the Trustee, in
         its  discretion,  may make such further inquiry or  investigation  into
         such facts or  matters as it may see fit,  and,  if the  Trustee  shall
         determine to make such further  inquiry or  investigation,  it shall be
         entitled,  upon reasonable notice to the Issuers, to examine the books,
         records,  and  premises  of the  Issuers,  personally  or by  agent  or
         attorney and to consult with the  officers and  representatives  of the
         Issuers, including the Issuers' accountants and attorneys.

                                       69


                  (f) The Trustee  shall be under no  obligation to exercise any
         of the rights or powers vested in it by this  Indenture at the request,
         order or direction of any of the Holders  pursuant to the provisions of
         this  Indenture,  unless such Holders shall have offered to the Trustee
         security or indemnity  reasonably  satisfactory  to the Trustee against
         the costs,  expenses  and  liabilities  which may be  incurred by it in
         compliance with such request, order or direction.

                  (g) The  Trustee  shall  not be  required  to give any bond or
         surety  in  respect  of  the  performance  of  its  powers  and  duties
         hereunder.

                  (h)  Delivery of reports,  information  and  documents  to the
         Trustee under Section 4.08 is for  informational  purposes only and the
         Trustee's  receipt of the foregoing  shall not constitute  constructive
         notice  of any  information  contained  therein  or  determinable  from
         information  contained therein,  including the Issuers' compliance with
         any of their  covenants  hereunder (as to which the Trustee is entitled
         to rely exclusively on Officers' Certificates).

         SECTION 7.03.  Individual Rights of Trustee

         The  Trustee in its  individual  or any other  capacity  may become the
owner or pledgee of Notes and may otherwise deal with the Issuers,  any of their
Subsidiaries,  or their respective Affiliates with the same rights it would have
if it were not Trustee. Any Agent may do the same with like rights. However, the
Trustee must comply with Sections 7.10 and 7.11.

         SECTION 7.04.  Trustee's Disclaimer

         The Trustee makes no  representation  as to the validity or adequacy of
this Indenture or the Notes,  and it shall not be  accountable  for the Issuers'
use of the  proceeds  from the Notes,  and it shall not be  responsible  for any
statement of the Issuers in this Indenture or the Notes other than the Trustee's
certificate of authentication.

         SECTION 7.05.  Notice of Default

         If a Default or an Event of Default  occurs and is continuing and if it
is known to a Trust Officer, the Trustee shall mail to each Holder notice of the
uncured  Default or Event of Default  within 90 days after  obtaining  knowledge
thereof.  Except in the case of a Default  or an Event of  Default in payment of
principal  of, or interest on, any Note,  including an  accelerated  payment,  a
Default in payment on the Change of Control Payment Date pursuant to a Change of
Control  Offer or on the Net  Proceeds  Offer  Payment  Date  pursuant  to a Net
Proceeds Offer and a Default in compliance with Article Five hereof, the Trustee
may withhold the notice if and so long as its Board of Directors,  the executive
committee of its Board of Directors or a committee of its directors and/or Trust
Officers in good faith determines that withholding the notice is in the interest

                                       70


of the Holders.  The foregoing sentence of this Section 7.05 shall be in lieu of
the proviso to ss.  315(b) of the TIA and such proviso to ss.  315(b) of the TIA
is hereby expressly  excluded from this Indenture and the Notes, as permitted by
the TIA.

         SECTION 7.06.  Reports by Trustee to Holders

         Within 60 days after  November 1 of each year  beginning with 1998, the
Trustee shall, to the extent that any of the events  described in TIA ss. 313(a)
occurred  within the previous  twelve months,  but not  otherwise,  mail to each
Holder a brief report dated as of such date that complies  with TIA ss.  313(a).
The Trustee also shall comply with TIA ss.ss. 313(b), (c) and (d).

         A copy of each  report at the time of its  mailing to Holders  shall be
mailed to the Issuers and filed with the Commission and each stock exchange,  if
any, on which the Notes are listed.

         The  Issuers  shall  promptly  notify the  Trustee if the Notes  become
listed on any stock exchange and the Trustee shall comply with TIA ss. 313(d).

         SECTION 7.07.  Compensation and Indemnity

         The  Issuers   shall  pay  to  the  Trustee  from  time  to  time  such
compensation  for its  services as has been  agreed to in writing  signed by the
Issuers and the Trustee. The Trustee's  compensation shall not be limited by any
law on  compensation  of a  trustee  of an  express  trust.  The  Issuers  shall
reimburse  the Trustee upon request for all  reasonable  out-of-pocket  expenses
incurred or made by it in connection  with the  performance  of its duties under
this Indenture.  Such expenses shall include the reasonable fees and expenses of
the Trustee's agents, counsel, accountants and experts.

         The Issuers  shall  indemnify  each of the Trustee (or any  predecessor
Trustee) and its agents, employees,  stockholders,  Affiliates and directors and
officers for, and hold them each harmless against, any and all loss,  liability,
damage,  claim or expense  (including  reasonable fees and expenses of counsel),
including  taxes (other than taxes based on the income of the Trustee)  incurred
by them  except for such  actions to the extent  caused by any  negligence,  bad
faith or willful  misconduct on their part, arising out of or in connection with
the acceptance or  administration  of this trust including the reasonable  costs
and  expenses  of  defending  themselves  against  any  claim  or  liability  in
connection  with the exercise or performance  of any of their rights,  powers or
duties  hereunder.  The Trustee  shall notify the Issuers  promptly of any claim
asserted  against the Trustee for which it may seek indemnity.  At the Trustee's
sole  discretion,  the  Issuers  shall  defend the claim and the  Trustee  shall
cooperate  and may  participate  in the  defense;  provided,  however,  that any
settlement  of a claim  shall be  approved  in  writing  by the  Trustee if such
settlement  would  result in an admission of liability by the Trustee or if such
settlement  would not be  accompanied  by a full  release of the Trustee for all

                                       71


liability  arising out of the events  giving rise to such claim.  Alternatively,
the Trustee may at its option have separate  counsel of its own choosing and the
Issuers shall pay the reasonable fees and expenses of such counsel.

         To secure the Issuers'  payment  obligations  in this Section 7.07, the
Trustee  shall  have a lien  prior to the Notes on all  assets or money  held or
collected by the Trustee,  in its  capacity as Trustee,  except  assets or money
held in trust to pay principal of or premium,  if any, or interest on particular
Notes.

         When the Trustee incurs expenses or renders  services after an Event of
Default  specified  in Section  6.01(f) or (g)  occurs,  such  expenses  and the
compensation   for  such  services  are  intended  to  constitute   expenses  of
administration under any Bankruptcy Law.

         The  provisions of this Section 7.07 shall survive the  termination  of
this Indenture.

         SECTION 7.08.  Replacement of Trustee

         The Trustee may resign at any time by so  notifying  the  Issuers.  The
Holders of a majority in principal  amount of the  outstanding  Notes may remove
the Trustee and appoint a successor  Trustee  with the Issuers'  consent,  by so
notifying the Issuers and the Trustee. The Issuers may remove the Trustee if:

                  (1)      the Trustee fails to comply with Section 7.10;

                  (2)      the Trustee is adjudged bankrupt or insolvent;

                  (3) a receiver or other  public  officer  takes  charge of the
Trustee or its property; or

                  (4) the Trustee becomes incapable of acting.

         If the  Trustee  resigns or is  removed  or if a vacancy  exists in the
office of Trustee for any reason,  the Issuers  shall notify each Holder of such
event and shall promptly appoint a successor Trustee.  Within one year after the
successor Trustee takes office, the Holders of a majority in aggregate principal
amount of the outstanding  Notes may appoint a successor  Trustee to replace the
successor Trustee appointed by the Issuers.

         A  successor  Trustee  shall  deliver  a  written   acceptance  of  its
appointment to the retiring Trustee and to the Issuers.  Immediately after that,
the retiring  Trustee  shall  transfer all property held by it as Trustee to the
successor Trustee, subject to the lien provided in Section 7.07, the resignation
or removal of the retiring  Trustee  shall become  effective,  and the successor

                                       72


Trustee  shall have all the rights,  powers and duties of the Trustee under this
Indenture. The Issuers shall mail notice of such successor Trustee's appointment
to each Holder.

         If a successor  Trustee  does not take office  within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Issuers or the
Holders of at least 10% in aggregate  principal amount of the outstanding  Notes
may  petition  any court of  competent  jurisdiction  for the  appointment  of a
successor Trustee.

         If the  Trustee  fails to comply  with  Section  7.10,  any  Holder may
petition any court of competent  jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

         Notwithstanding  any resignation or replacement of the Trustee pursuant
to this Section 7.08, the Issuers' obligations under Section 7.07 shall continue
for the benefit of the retiring Trustee.
         SECTION 7.09.  Successor Trustee by Merger, Etc

         If the Trustee consolidates with, merges or converts into, or transfers
all  or   substantially   all  of  its  corporate  trust  business  to,  another
corporation,  the  resulting,  surviving or transferee  corporation  without any
further act shall,  if such  resulting,  surviving or transferee  corporation is
otherwise eligible hereunder, be the successor Trustee; provided,  however, that
such  corporation  shall be otherwise  qualified and eligible under this Article
Seven.

         SECTION 7.10  Eligibility; Disqualification

         This   Indenture   shall  always  have  a  Trustee  who  satisfies  the
requirement of TIA ss.ss.  310(a)(1),  (2) and (5). The Trustee (or, in the case
of a Trustee that is a corporation  included in a bank holding  company  system,
the related bank holding  company) shall have a combined  capital and surplus of
at least $150 million as set forth in its most recent published annual report of
condition,  and  have a  Corporate  Trust  Office  in the City of New  York.  In
addition,  if the Trustee is a  corporation  included in a bank holding  company
system, the Trustee,  independently of such bank holding company, shall meet the
capital requirements of TIA ss. 310(a)(2). The Trustee shall comply with TIA ss.
310(b);  provided,  however,  that there shall be excluded from the operation of
TIA ss. 310(b)(1) any indenture or indentures under which other  securities,  or
certificates of interest or  participation in other  securities,  of the Issuers
are  outstanding,  if the  requirements  for such exclusion set forth in TIA ss.
310(b)(1) are met. The provisions of TIA ss. 310 shall apply to the Company,  as
obligors of the Notes.

         SECTION 7.11  Preferential Collection of Claims Against Issuers

         The Trustee  shall comply with TIA ss.  311(a),  excluding any creditor
relationship  listed in TIA ss.  311(b).  A  Trustee  who has  resigned  or been
removed shall be subject to TIA ss. 311(a) to the extent indicated therein.  The

                                       73


provisions of TIA ss. 311 shall apply to the Issuers, as obligors on the Notes.


                                  ARTICLE EIGHT

                       DISCHARGE OF INDENTURE; DEFEASANCE

         SECTION 8.01  Termination of Issuers' Obligations

         This  Indenture  will be  discharged  and will  cease to be of  further
effect (except as to surviving rights of registration of transfer or exchange of
the Notes,  as expressly  provided for in this  Indenture) as to all outstanding
Notes when (a) either (i) all Notes,  theretofore  authenticated  and  delivered
(except  lost,  stolen or destroyed  Notes which have been  replaced or paid and
Notes for  whose  payment  money  has  theretofore  been  deposited  in trust or
segregated and held in trust by the Issuers and thereafter repaid to the Issuers
or  discharged  from  such  trust)  have  been  delivered  to  the  Trustee  for
cancellation  or (ii) all Notes not  theretofore  delivered  to the  Trustee for
cancellation  have  become due and  payable  and the  Issuers  have  irrevocably
deposited  or  caused  to be  deposited  with the  Trustee  funds  in an  amount
sufficient  to pay and  discharge  the  entire  Indebtedness  on the  Notes  not
theretofore  delivered  to the  Trustee  for  cancellation,  for  principal  of,
premium,  if any, and interest on the Notes to the date of deposit together with
irrevocable  instructions  from the Issuers  directing the Trustee to apply such
funds to the payment thereof at maturity or redemption,  as the case may be; (b)
the  Issuers  have paid all other  sums  payable  under  this  Indenture  by the
Issuers;  and (c)  the  Issuers  have  delivered  to the  Trustee  an  officers'
certificate  and an opinion of counsel  stating  that all  conditions  precedent
under  this  Indenture  relating  to the  satisfaction  and  discharge  of  this
Indenture  have been complied  with;  provided,  however,  that such counsel may
rely, as to matters of fact, on a certificate or certificates of officers of the
Issuers.

         The Issuers may, at their  option and at any time,  elect to have their
obligations  and the  corresponding  obligations  of the  Subsidiary  Guarantors
discharged  with respect to the  outstanding  Notes ("Legal  Defeasance").  Such
Legal  Defeasance  means  that the  Issuers  shall be  deemed  to have  paid and
discharged the entire  indebtedness  represented by the outstanding  Notes,  and
satisfied all of their obligations with respect to the Notes, except for (a) the
rights of Holders to receive  payments in respect of the principal of,  premium,
if any, and  interest on the Notes when such  payments are due, (b) the Issuers'
obligations  with  respect  to the Notes  concerning  issuing  temporary  Notes,
registration  of  Notes,  mutilated,  destroyed,  lost or  stolen  Notes and the
maintenance of an office or agency for payments,  (c) the rights, powers, trust,
duties and immunities of the Trustee and the Issuers'  obligations in connection
therewith  and (d) the Legal  Defeasance  provisions  of this Section  8.01.  In
addition,  the Issuers may, at their  option and at any time,  elect to have the
obligations of the Issuers and the Subsidiary Guarantors,  if any, released with
respect to covenants  contained in Sections 4.04, 4.08 and 4.10 through 4.20 and

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Article Five ("Covenant  Defeasance") and thereafter any omission to comply with
such obligations shall not constitute a Default or Event of Default with respect
to the Notes. In the event of Covenant Defeasance,  those events described under
Section 6.01 (except those events described in Section  6.01(a),(b),(f) and (g))
will no longer constitute an Event of Default with respect to the Notes.

         In order to exercise either Legal Defeasance or Covenant Defeasance:

                  (a) the Issuers must irrevocably  deposit with the Trustee, in
         trust,  for the benefit of the Holders cash in United  States  dollars,
         non-callable U.S. Government Obligations,  or a combination thereof, in
         such  amounts as will be  sufficient,  in the  opinion of a  nationally
         recognized firm of independent public accountants, to pay the principal
         of,  premium,  if any, and interest on the Notes on the stated date for
         payment thereof or on the applicable  Redemption  Date, as the case may
         be;

                  (b) in the case of Legal  Defeasance,  the Issuers  shall have
         delivered  to the  Trustee an  opinion of counsel in the United  States
         reasonably  acceptable to the Trustee  confirming  that (i) the Issuers
         have  received  from,  or there has been  published  by,  the  Internal
         Revenue Service a ruling or (ii) since the Series A/B Issue Date, there
         has been a change in the  applicable  federal income tax law, in either
         case to the effect  that,  and based  thereon  such  opinion of counsel
         shall confirm that, the Holders will not recognize income, gain or loss
         for federal  income tax  purposes as a result of such Legal  Defeasance
         and will be subject to federal  income tax on the same amounts,  in the
         same  manner  and at the same times as would have been the case if such
         Legal Defeasance had not occurred;

                  (c) in the case of Covenant Defeasance, the Issuers shall have
         delivered  to the  Trustee an  opinion of counsel in the United  States
         reasonably  acceptable to the Trustee  confirming that the Holders will
         not recognize income, gain or loss for federal income tax purposes as a
         result of such  Covenant  Defeasance  and will be  subject  to  federal
         income  tax on the same  amounts,  in the same  manner  and at the same
         times as would have been the case if such Covenant  Defeasance  had not
         occurred;

                  (d) no Default or Event of Default  shall have occurred and be
         continuing  on the date of such deposit or insofar as Events of Default
         under Section 6.01(f) or (g) from  bankruptcy or insolvency  events are
         concerned,  at any time in the period  ending on the 91st day after the
         date of deposit;

                  (e) such Legal  Defeasance  or Covenant  Defeasance  shall not
         result in a breach or violation  of, or constitute a default under this
         Indenture or any other  agreement or instrument to which the Company or
         any of its Restricted  Subsidiaries  is a party or by which the Company
         or any of its Restricted Subsidiaries is bound;

                                       75


                  (f)  the  Issuers  shall  have  delivered  to the  Trustee  an
         officers'  certificate  stating  that the  deposit  was not made by the
         Issuers  with the  intent  of  preferring  the  Holders  over any other
         creditors of either Issuer or with the intent of defeating,  hindering,
         delaying or defrauding any other creditors of the Issuers or others;

                  (g)  the  Issuers  shall  have  delivered  to the  Trustee  an
         Officers'  Certificate and an Opinion of Counsel, each stating that all
         conditions  precedent  provided for or relating to the Legal Defeasance
         or the  Covenant  Defeasance,  as the case may be,  have been  complied
         with; provided,  however,  that such counsel may rely, as to matters of
         fact, on a certificate or certificates of officers of the Issuers;

                  (h) the Issuers shall have delivered to the Trustee an Opinion
         of Counsel to the effect that after the 91st day following the deposit,
         the trust  funds will not be  subject  to the effect of any  applicable
         bankruptcy,  insolvency,   reorganization  or  similar  laws  affecting
         creditors' rights generally; and

                  (i)  certain   other   customary   conditions   precedent  are
satisfied.

         SECTION 8.02.  Application of Trust Money

         The Trustee or Paying  Agent shall hold in trust U.S.  Legal  Tender or
U.S.  Government  Obligations  deposited  with it pursuant to Section 8.01,  and
shall apply the deposited U.S.  Legal Tender and the money from U.S.  Government
Obligations in accordance with this Indenture to the payment of the principal of
and interest on the Notes.  The Trustee  shall be under no  obligation to invest
said U.S. Legal Tender or U.S. Government  Obligations except as it may agree in
writing with the Issuers.

         The Issuers shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the Legal Tender or U.S.  Government
Obligations  deposited  pursuant to Section 8.01 or the  principal  and interest
received in respect  thereof  other than any such tax, fee or other charge which
by law is for the account of the Holders of outstanding Notes.

         SECTION 8.03.  Repayment to the Issuers

         Subject  to Section  8.01,  the  Trustee  and the  Paying  Agent  shall
promptly pay to the Issuers  upon  request any excess U.S.  Legal Tender or U.S.
Government  Obligations held by them at any time and thereupon shall be relieved
from all liability with respect to such money.  The Trustee and the Paying Agent
shall pay to the Issuers  upon request any money held by them for the payment of
principal or interest that remains  unclaimed for one year;  provided,  however,
that the  Trustee  or such  Paying  Agent,  before  being  required  to make any

                                       76


payment,  may at the  expense of the  Issuers  cause to be  published  once in a
newspaper of general  circulation in the City of New York or mail to each Holder
entitled to such money notice that such money remains unclaimed and that after a
date  specified  therein  which  shall be at least 30 days from the date of such
publication  or mailing any unclaimed  balance of such money then remaining will
be repaid to the Issuers. After payment to the Issuers, Holders entitled to such
money  must look to the  Issuers  for  payment as  general  creditors  unless an
applicable law designates another Person.

         SECTION 8.04.  Reinstatement

         If the Trustee or Paying Agent is unable to apply any U.S. Legal Tender
or U.S. Government  Obligations in accordance with Section 8.01 by reason of any
legal  proceeding  or by  reason  of any  order  or  judgment  of any  court  or
governmental  authority  enjoining,  restraining or otherwise  prohibiting  such
application,  the Issuers'  obligations under this Indenture and the Notes shall
be revived and reinstated as though no deposit had occurred  pursuant to Section
8.01 until such time as the Trustee or Paying  Agent is  permitted  to apply all
such U.S. Legal Tender or U.S. Government Obligations in accordance with Section
8.01; provided,  however,  that if the Issuers have made any payment of interest
on or principal of any Notes because of the reinstatement of their  obligations,
the Issuers  shall be  subrogated  to the rights of the Holders of such Notes to
receive such payment from the U.S.
Legal Tender or U.S. Government Obligations held by the Trustee or Paying Agent.

         SECTION 8.05.  Acknowledgment of Discharge by Trustee

         After (i) the conditions of Section 8.01 have been satisfied,  (ii) the
Issuers have paid or caused to be paid all other sums  payable  hereunder by the
Issuers and (iii) each of the Issuers has  delivered to the Trustee an Officers'
Certificate  and an  Opinion  of  Counsel,  each  stating  that  all  conditions
precedent  referred  to in clause (i) above  relating  to the  satisfaction  and
discharge of this Indenture have been complied with, the Trustee upon request of
the  Issuers  shall  acknowledge  in  writing  the  discharge  of  the  Issuers'
obligations  under  this  Indenture  except  for  those  surviving   obligations
specified in Section 8.01, provided the legal counsel delivering such Opinion of
Counsel may rely as to matters of fact on one or more Officers'  Certificates of
the Issuers.


                                  ARTICLE NINE

                          MODIFICATION OF THE INDENTURE

         SECTION 9.01.  Without Consent of Holders

         Subject to the provisions of Section 9.02, the Issuers,  the Subsidiary
Guarantors and the Trustee may amend, waive or supplement this Indenture without
notice  to or  consent  of any  Holder:  (a) to cure any  ambiguity,  defect  or
inconsistency; (b) to comply with Section 5.01 of this Indenture; (c) to provide

                                       77


for uncertificated  Notes in addition to certificated  Notes; (d) to comply with
any  requirements  of  the  Commission  in  order  to  effect  or  maintain  the
qualification  of this  Indenture  under the TIA; or (e) to make any change that
would provide any  additional  benefit or rights to the Holders or that does not
adversely affect the rights of any Holder.  Notwithstanding  the foregoing,  the
Trustee  and the  Issuers  may not make any change  that  adversely  affects the
rights of any Holder under this Indenture without the consent of such Holder. In
formulating its opinion on such matters, the Trustee will be entitled to rely on
such evidence as it deems appropriate,  including, without limitation, solely on
an Opinion of Counsel;  provided,  however,  that in delivering  such Opinion of
Counsel,  such  counsel  may rely as to matters  of fact,  on a  certificate  or
certificates of officers of the Company.

         SECTION 9.02.  With Consent of Holders

         All other  modifications  and  amendments of this Indenture may be made
with the consent of the Holders of a majority in the then outstanding  principal
amount of the then outstanding  Notes,  except that, without the consent of each
Holder of the Notes affected thereby,  no amendment may, directly or indirectly:
(i) reduce the amount of Notes whose Holders must consent to any amendment; (ii)
reduce  the rate of or  change  the  time for  payment  of  interest,  including
defaulted  interest,  on any Notes;  (iii) reduce the principal of or change the
fixed  maturity  of any  Notes,  or  change  the date on which  any Notes may be
subject to  redemption  or  repurchase,  or reduce the  redemption or repurchase
price  therefor;  (iv) make any Notes payable in money other than that stated in
the Notes;  (v) make any change in provisions of this  Indenture  protecting the
right of each Holder of a Note to receive  payment of  principal of and interest
on such Note on or after the due date  thereof or to bring suit to enforce  such
payment or permitting Holders of a majority in aggregate principal amount of the
then  outstanding  Notes to waive  Defaults  or Events of  Default;  (vi) amend,
change or modify in any material  respect the  obligation of the Issuers to make
and  consummate a Change of Control Offer in the event of a Change of Control or
make and consummate a Net Proceeds Offer with respect to any Asset Sale that has
been  consummated or modify any of the  provisions or  definitions  with respect
thereto;  (vii) modify or change any provision of this Indenture or Section 1.01
affecting the ranking of the Notes or any Guarantee in a manner which  adversely
affects the Holders; or (viii) release any Subsidiary  Guarantor from any of its
obligations  under its Guarantee or this Indenture  otherwise than in accordance
with the terms of this Indenture.

         SECTION 9.03.  Compliance with TIA

         Every  amendment,  waiver or supplement of this  Indenture or the Notes
shall  comply  with the TIA as then in  effect;  provided,  however,  that  this
Section 9.03 shall not of itself  require that this  Indenture or the Trustee be
qualified  under the TIA or constitute  any admission or  acknowledgment  by any
party  hereto that any such  qualification  is  required  prior to the time this
Indenture and the Trustee are required by the TIA to be so qualified.

                                       78


         SECTION 9.04.  Revocation and Effect of Consents

         Until an amendment,  waiver or supplement becomes effective,  a consent
to it by a Holder is a  continuing  consent by the  Holder and every  subsequent
Holder  of a Note or  portion  of a Note  that  evidences  the same  debt as the
consenting  Holder's  Note,  even if  notation of the consent is not made on any
Note. Subject to the following  paragraph,  any such Holder or subsequent Holder
may  revoke  the  consent  as to such  Holder's  Note or portion of such Note by
notice to the  Trustee  or the  Issuers  received  before  the date on which the
Trustee  receives an Officers'  Certificate  certifying  that the Holders of the
requisite  principal amount of Notes have consented (and not theretofore revoked
such consent) to the amendment,  supplement or waiver. An amendment,  supplement
or waiver  becomes  effective  upon  receipt by the  Trustee  of such  Officers'
Certificate  and evidence of consent by the Holders of the requisite  percentage
in principal amount of outstanding Notes.

         The Issuers may,  but shall not be obligated  to, fix a Record Date for
the purpose of  determining  the Holders  entitled to consent to any  amendment,
supplement  or waiver,  which Record Date shall be at least 30 days prior to the
first   solicitation  of  such  consent.   If  a  Record  Date  is  fixed,  then
notwithstanding  the second  sentence of the  immediately  preceding  paragraph,
those  Persons who were  Holders at such  Record Date (or their duly  designated
proxies),  and only those  Persons,  shall be  entitled  to revoke  any  consent
previously given,  whether or not such Persons continue to be Holders after such
Record Date.  No such consent  shall be valid or effective for more than 90 days
after such Record Date unless consents from Holders of the requisite  percentage
in  principal   amount  of  outstanding   Notes   required   hereunder  for  the
effectiveness of such consents shall have also been given and not revoked within
such 90 day period.

         SECTION 9.05.  Notation on or Exchange of Notes

         If an amendment,  supplement or waiver changes the terms of a Note, the
Trustee may require  the Holder of such Note to deliver it to the  Trustee.  The
Trustee may place an  appropriate  notation on the Note about the changed  terms
and return it to the  Holder.  Alternatively,  if the  Issuers or the Trustee so
determine,  the  Issuers in  exchange  for the Note shall  issue and the Trustee
shall authenticate a new Note that reflects the changed terms.

         SECTION 9.06.  Trustee To Sign Amendments, Etc

         The  Trustee  shall  execute  any   amendment,   supplement  or  waiver
authorized pursuant to this Article Nine;  provided,  however,  that the Trustee
may, but shall not be obligated to,  execute any such  amendment,  supplement or
waiver which affects the Trustee's own rights,  duties or immunities  under this
Indenture.  In executing such supplement or waiver the Trustee shall be entitled
to receive indemnity reasonably satisfactory to it, and shall be fully protected

                                       79


in  relying  upon an Opinion of Counsel  and an  Officers'  Certificate  of each
Issuer,  each stating  that no event of default  shall occur as a result of such
amendment,  supplement  or  waiver  and that  the  execution  of any  amendment,
supplement or waiver  authorized  pursuant to this Article Nine is authorized or
permitted by this Indenture,  provided the legal counsel delivering such Opinion
of Counsel may rely as to matters of fact on one or more Officers'  Certificates
of the Issuers. Such Opinion of Counsel shall not be an expense of the Trustee.


                                   ARTICLE TEN

                                  MISCELLANEOUS

         SECTION 10.01.  TIA Controls

         If any provision of this Indenture limits, qualifies, or conflicts with
another provision which is required to be included in this Indenture by the TIA,
the required provision shall control; provided, however, that this Section 10.01
shall not of itself  require  that this  Indenture  or the Trustee be  qualified
under the TIA or constitute any admission or  acknowledgment by any party hereto
that any such qualification is required prior to the time this Indenture and the
Trustee are required by the TIA to be so qualified.

         SECTION 10.02.  Notices

         Any notices or other  communications  required or  permitted  hereunder
shall be in writing,  and shall be sufficiently  given if made by hand delivery,
by telex, by telecopier or registered or certified mail, postage prepaid, return
receipt requested, addressed as follows:

                  if to the Issuers:

                           c/o Abraxas Petroleum Corporation
                           500 North Loop 1604 East
                           Suite 100
                           San Antonio, Texas  78232
                           Telecopier Number:  (210) 490-8816

                           Attn:  Chief Executive Officer

                  if to the Trustee:

                           IBJ Schroder Bank & Trust Company
                           One State Street
                           Eleventh Floor



                                       80


                           New York, New York  10004

                           Telecopier Number:  (212) 858-2952
                           Attention:  Corporate Trust Trustee
                                              Administration

         Each of the Issuers and the Trustee by written  notice to the other may
designate  additional  or different  addresses  for notices to such Person.  Any
notice or  communication  to the Issuers or the Trustee  shall be deemed to have
been given or made as of the date so delivered if hand delivered;  when answered
back, if telexed; when receipt is acknowledged,  if faxed; and five (5) calendar
days after  mailing if sent by  registered or certified  mail,  postage  prepaid
(except  that a notice  of change  of  address  shall not be deemed to have been
given until actually received by the addressee).

         Any notice or  communication  mailed to a Holder shall be mailed to him
by first  class mail or other  equivalent  means at his address as it appears on
the registration  books of the Registrar ten (10) days prior to such mailing and
shall be sufficiently given to him if so mailed within the time prescribed.

         Failure to mail a notice or  communication to a Holder or any defect in
it shall not affect its sufficiency  with respect to other Holders.  If a notice
or  communication  is mailed in the manner  provided  above,  it is duly  given,
whether or not the addressee receives it.

         SECTION 10.03.  Communications by Holders with Other Holders

         Holders may  communicate  pursuant to TIA ss. 312(b) with other Holders
with respect to their rights under this Indenture or the Notes. The Issuers, the
Trustee, the Registrar and any other Person shall have the protection of TIA ss.
312(c).

         SECTION 10.04.  Certificate and Opinion as to Conditions Precedent

         Upon any request or  application  by the Issuers to the Trustee to take
any action under this Indenture, the Issuers shall furnish to the Trustee:

                  (1)  an   Officers'   Certificate,   in  form  and   substance
         satisfactory  to the  Trustee,  stating  that,  in the  opinion  of the
         signers,  all conditions  precedent to be performed by the Issuers,  if
         any,  provided for in this  Indenture  relating to the proposed  action
         have been complied with; and

                  (2) an Opinion of Counsel stating that, in the opinion of such
         counsel,  all such conditions precedent to be performed by the Issuers,
         if any, provided for in this Indenture  relating to the proposed action
         have been complied with (which counsel, as to factual matters, may rely
         on an Officers'  Certificate).

                                       81

 
         SECTION 10.05. Statements Required in Certificate or Opinion

         Each certificate or opinion with respect to compliance with a condition
or covenant provided for in this Indenture, other than the Officers' Certificate
required by Section 4.06, shall include:

                  (1) a statement  that the Person  making such  certificate  or
         opinion has read such covenant or condition;

                  (2) a  brief  statement  as to the  nature  and  scope  of the
         examination  or  investigation  upon which the  statements  or opinions
         contained in such certificate or opinion are based;

                  (3) a statement  that,  in the opinion of such Person,  he has
         made such examination or  investigation  as is reasonably  necessary to
         enable  him to express  an  informed  opinion as to whether or not such
         covenant or condition has been complied with; and

                  (4) a  statement  as to whether or not, in the opinion of each
         such Person, such condition or covenant has been complied with.

         SECTION 10.06.  Rules by Trustee, Paying Agent, Registrar

         The Trustee may make reasonable  rules in accordance with the Trustee's
customary  practices for action by or at a meeting of Holders.  The Paying Agent
or Registrar may make reasonable rules for its functions.

         SECTION 10.07.  Legal Holidays

         A "Legal Holiday" used with respect to a particular place of payment is
a Saturday,  a Sunday or a day on which banking  institutions  in New York,  New
York or at such place of payment are not required to be open.  If a payment date
is a Legal Holiday at such place,  payment may be made at such place on the next
succeeding day that is not a Legal Holiday, and no interest shall accrue for the
intervening period.

         SECTION 10.08.  Governing Law

         THIS  INDENTURE  AND THE NOTES SHALL BE GOVERNED  BY AND  CONSTRUED  IN
ACCORDANCE  WITH THE LAWS OF THE STATE OF NEW YORK, AS APPLIED TO CONTRACTS MADE
AND  PERFORMED  WITHIN THE STATE OF NEW YORK,  WITHOUT  REGARD TO  PRINCIPLES OF
CONFLICT  OF  LAWS.  Each  of  the  parties  hereto  agrees  to  submit  to  the
jurisdiction  of the courts of the State of New York in any action or proceeding
arising out of or relating to this Indenture.

         SECTION 10.09.  No Adverse Interpretation of Other Agreements

                                       82


         This Indenture may not be used to interpret another indenture,  loan or
debt  agreement  of  either  Issuer  or  any of  their  Subsidiaries.  Any  such
indenture, loan or debt agreement may not be used to interpret this Indenture.

         SECTION 10.10.  No Personal Liability

         No  director,  officer,  employee or  stockholder,  as such,  of either
Issuer or any Subsidiary  Guarantor,  as such,  shall have any liability for any
obligations of either Issuer or any Subsidiary  Guarantor under the Notes,  this
Indenture,  the Guarantees or the Registration Rights Agreement or for any claim
based on, in respect of, or by reason of, such  obligations  or their  creation.
Each Holder of Notes by accepting a Note waives and releases all such liability.
The waiver and release  are part of the  consideration  for the  issuance of the
Notes.

         SECTION 10.11.  Successors

         All  agreements  of the Issuers in this  Indenture  and the Notes shall
bind their  successors.  All agreements of the Trustee in this  Indenture  shall
bind its successors.

         SECTION 10.12.  Duplicate Originals

         All  parties  may sign any  number of copies  of this  Indenture.  Each
signed copy shall be an original,  but all of them together shall  represent the
same agreement.

         SECTION 10.13.  Severability

         In case any one or more of the  provisions in this  Indenture or in the
Notes shall be held invalid,  illegal or  unenforceable,  in any respect for any
reason, the validity, legality and enforceability of any such provision in every
other respect and of the remaining  provisions  shall not in any way be affected
or impaired  thereby,  it being intended that all of the provisions hereof shall
be enforceable to the full extent permitted by law.

         SECTION 10.14.  Independence of Covenants

         All covenants and  agreements in this  Indenture and the Notes shall be
given  independent  effect so that if any particular  action or condition is not
permitted  by any of such  covenants,  the fact that it would be permitted by an
exception to, or otherwise be within the limitations of, another  covenant shall
not avoid the  occurrence  of a Default or an Event of Default if such action is
taken or condition exists.

                                       83



                                 ARTICLE ELEVEN

                               GUARANTEE OF NOTES

         SECTION 11.01.  Unconditional Guarantee

         Subject to the  provisions  of this  Article  Eleven,  each  Subsidiary
Guarantor,   if  any,  hereby,   jointly  and  severally,   unconditionally  and
irrevocably  guarantees,  on a senior  basis (such  guarantee  to be referred to
herein as a "Guarantee") to each Holder of a Note authenticated and delivered by
the Trustee and to the Trustee and its successors and assigns,  irrespective  of
the validity and enforceability of this Indenture,  the Notes or the obligations
of the Issuers or any other Subsidiary  Guarantors to the Holders or the Trustee
hereunder or  thereunder,  that:  (a) the  principal  of,  premium,  if any, and
interest on the Notes (and any  Additional  Interest  payable  thereon) shall be
duly and punctually paid in full when due, whether at maturity,  upon redemption
at the  option of  Holders  pursuant  to the  provisions  of the Notes  relating
thereto, by acceleration or otherwise, and interest on the overdue principal and
(to the extent  permitted by law)  interest,  if any, on the Notes and all other
obligations  of the Issuers or the  Subsidiary  Guarantors to the Holders or the
Trustee hereunder or thereunder (including amounts due the Trustee under Section
7.07  hereof)  and all  other  obligations  shall  be  promptly  paid in full or
performed,  all in accordance with the terms hereof and thereof; and (b) in case
of any extension of time of payment or renewal of any Notes or any of such other
obligations,  the same shall be promptly  paid in full when due or  performed in
accordance with the terms of the extension or renewal,  whether at maturity,  by
acceleration or otherwise. Failing payment when due of any amount so guaranteed,
or failing  performance  of any other  obligation  of the Issuers to the Holders
under this Indenture or under the Notes,  for whatever  reason,  each Subsidiary
Guarantor  shall be obligated to pay, or to perform or cause the performance of,
the same  immediately.  An Event of Default  under this  Indenture  or the Notes
shall constitute an event of default under this Guarantee, and shall entitle the
Holders of Notes to accelerate the  obligations  of the Guarantors  hereunder in
the same manner and to the same extent as the obligations of the Issuers.

         Each of the Subsidiary  Guarantors  hereby agrees that its  obligations
hereunder shall be  unconditional,  irrespective of the validity,  regularity or
enforceability  of the Notes or this  Indenture,  the  absence  of any action to
enforce the same,  any waiver or consent by any Holder of the Notes with respect
to any  provisions  hereof or  thereof,  any  release  of any  other  Subsidiary
Guarantor,  the  recovery of any  judgment  against the  Issuers,  any action to
enforce the same,  whether or not a Guarantee is affixed to any particular Note,
or any other circumstance which might otherwise  constitute a legal or equitable
discharge or defense of a guarantor.  Each of the Subsidiary  Guarantors  hereby
waives the  benefit of  diligence,  presentment,  demand of  payment,  filing of
claims with a court in the event of insolvency or bankruptcy of the Issuers, any
right to require a proceeding first against the Issuers, protest, notice and all
demands  whatsoever  and covenants  that its  Guarantee  shall not be discharged
except by complete  performance of the obligations  contained in the Notes, this
Indenture and this  Guarantee.  This Guarantee is a guarantee of payment and not
of  collection.  If any  Holder  or the  Trustee  is  required  by any  court or

                                       84


otherwise  to return  to the  Issuers  or to any  Subsidiary  Guarantor,  or any
custodian,  trustee,  liquidator or other similar official acting in relation to
the Issuers or such Subsidiary Guarantor, any amount paid by the Issuers or such
Subsidiary  Guarantor  to the Trustee or such  Holder,  this  Guarantee,  to the
extent  theretofore  discharged,  shall be  reinstated in full force and effect.
Each Subsidiary  Guarantor  further agrees that, as between it, on the one hand,
and the Holders of Notes and the Trustee, on the other hand, (a) subject to this
Article  Eleven,  the  maturity  of the  obligations  guaranteed  hereby  may be
accelerated  as  provided  in  Article  Six  hereof  for  the  purposes  of this
Guarantee,  notwithstanding any stay, injunction or other prohibition preventing
such acceleration in respect of the obligations  guaranteed  hereby,  and (b) in
the event of any  acceleration  of such  obligations  as provided in Article Six
hereof, such obligations (whether or not due and payable) shall forthwith become
due and payable by the Subsidiary Guarantors for the purpose of this Guarantee.

         No stockholder,  officer,  director,  employee or  incorporator,  past,
present or future, or any Subsidiary Guarantor, as such, shall have any personal
liability  under  this  Guarantee  by reason of his,  her or its  status as such
stockholder, officer, director, employee or incorporator.

         Each Subsidiary  Guarantor that makes a payment or  distribution  under
its Guarantee  shall be entitled to a  contribution  from each other  Subsidiary
Guarantor, determined in accordance with GAAP.

         SECTION 11.02.  Limitations on Guarantees

         The obligations of each  Subsidiary  Guarantor under its Guarantee will
be  limited  to the  maximum  amount  which,  after  giving  effect to all other
contingent and fixed  liabilities of such Subsidiary  Guarantor and after giving
effect to any  collections  from or  payments  made by or on behalf of any other
Subsidiary  Guarantor  in respect of the  obligations  of such other  Subsidiary
Guarantor under its Guarantee or pursuant to its contribution  obligations under
the Indenture, will result in the obligations of such Subsidiary Guarantor under
the Guarantee not  constituting a fraudulent  conveyance or fraudulent  transfer
under federal or state law.

         SECTION 11.03.  Execution and Delivery of Guarantee

         To further  evidence the  Guarantee  set forth in Section  11.01,  each
Subsidiary   Guarantor   hereby  agrees  that  a  notation  of  such  Guarantee,
substantially  in the form of Exhibit E herein,  shall be  endorsed on each Note
authenticated and delivered by the Trustee.  Such Guarantee shall be executed on
behalf of each Subsidiary  Guarantor by either manual or facsimile  signature of
two Officers of each  Subsidiary  Guarantor,  each of whom, in each case,  shall
have been duly authorized to so execute by all requisite  corporate action.  The
validity and  enforceability  of any Guarantee shall not be affected by the fact
that it is not affixed to any particular Note.

                                       85


         Each of the Subsidiary  Guarantors hereby agrees that its Guarantee set
forth in Section 11.01 shall remain in full force and effect notwithstanding any
failure to endorse on each Note a notation of such Guarantee.

         If an Officer of a  Subsidiary  Guarantor  whose  signature  is on this
Indenture  or a  Guarantee  no longer  holds that office at the time the Trustee
authenticates  the Note on  which  such  Guarantee  is  endorsed  or at any time
thereafter,  such Subsidiary  Guarantor's  Guarantee of such Note shall be valid
nevertheless.

         The  delivery  of any Note by the  Trustee,  after  the  authentication
thereof  hereunder,  shall constitute due delivery of any Guarantee set forth in
this Indenture on behalf of each Subsidiary Guarantor.

         SECTION 11.04.  Release of a Subsidiary Guarantor

         (a) If no Default exists or would exist under this Indenture,  upon the
sale or disposition of all of the Capital Stock of a Subsidiary Guarantor by the
Issuers or a Restricted Subsidiary of the Issuers in a transaction  constituting
an Asset Sale the Net Cash  Proceeds  of which are  applied in  accordance  with
Section 4.16, or upon the consolidation or merger of a Subsidiary Guarantor with
or into any Person in compliance with Article Five (in each case,  other than to
an  Issuer  or an  Affiliate  of an Issuer  or a  Restricted  Subsidiary),  such
Subsidiary  Guarantor and each Subsidiary of such  Subsidiary  Guarantor that is
also a Subsidiary  Guarantor shall be deemed released from all obligations under
this  Article  Eleven  without  any further  action  required on the part of the
Trustee or any Holder; provided, however, that each such Subsidiary Guarantor is
sold or disposed of in accordance with this Indenture.  Any Subsidiary Guarantor
not  so  released  or  the  entity  surviving  such  Subsidiary  Guarantor,   as
applicable,  shall remain or be liable  under its  Guarantee as provided in this
Article Eleven.

         (b) The Trustee shall deliver to the Issuers an appropriate  instrument
evidencing  the release of a Subsidiary  Guarantor  upon receipt of a request by
the Issuers or such Subsidiary Guarantor accompanied by an Officers' Certificate
and an Opinion of Counsel  certifying  as to the  compliance  with this  Section
11.04, provided the legal counsel delivering such Opinion of Counsel may rely as
to matters of fact on one or more Officers Certificates of the Issuers.
         The Trustee  shall execute any  documents  reasonably  requested by the
Issuers or a  Subsidiary  Guarantor  in order to  evidence  the  release of such
Subsidiary  Guarantor from its obligations  under its Guarantee  endorsed on the
Notes and under this Article Eleven.

         Except as set forth in Articles  Four and Five and this Section  11.04,
nothing  contained in this  Indenture  or in any of the Notes shall  prevent any
consolidation  or merger of a Subsidiary  Guarantor  with or into the Issuers or

                                       86


another  Subsidiary  Guarantor or shall  prevent any sale or  conveyance  of the
property  of a  Subsidiary  Guarantor  as an  entirety  or  substantially  as an
entirety to the Issuers or another Subsidiary Guarantor.

         SECTION 11.05.  Waiver of Subrogation

         Until this  Indenture is discharged and all of the Notes are discharged
and paid in full, each Subsidiary Guarantor hereby irrevocably waives and agrees
not to exercise any claim or other rights which it may now or hereafter  acquire
against the  Issuers  that arise from the  existence,  payment,  performance  or
enforcement  of the Issuers'  obligations  under the Notes or this Indenture and
such Subsidiary Guarantor's obligations under this Guarantee and this Indenture,
in any such instance including,  without  limitation,  any right of subrogation,
reimbursement,  exoneration,  contribution,  indemnification,  and any  right to
participate in any claim or remedy of the Holders  against the Issuers,  whether
or not such claim, remedy or right arises in equity, or under contract,  statute
or common law, including,  without limitation, the right to take or receive from
the Issuers,  directly or indirectly, in cash or other property or by set-off or
in any other  manner,  payment  or  security  on  account of such claim or other
rights. If any amount shall be paid to any Subsidiary  Guarantor in violation of
the  preceding  sentence and any amounts  owing to the Trustee or the Holders of
Notes under the Notes,  this  Indenture,  or any other  document  or  instrument
delivered under or in connection with such agreements or instruments,  shall not
have been paid in full,  such amount shall have been deemed to have been paid to
such Subsidiary  Guarantor for the benefit of, and held in trust for the benefit
of, the Trustee or the Holders  and shall  forthwith  be paid to the Trustee for
the  benefit  of  itself or such  Holders  to be  credited  and  applied  to the
obligations in favor of the Trustee or the Holders,  as the case may be, whether
matured or  unmatured,  in  accordance  with the terms of this  Indenture.  Each
Subsidiary  Guarantor  acknowledges  that it will  receive  direct and  indirect
benefits from the financing arrangements contemplated by this Indenture and that
the waiver set forth in this Section 11.05 is knowingly made in contemplation of
such benefits.

         SECTION 11.06.  Immediate Payment

         Each  Subsidiary  Guarantor  agrees to make  immediate  payment  to the
Trustee  on behalf of the  Holders  of all  Obligations  owing or payable to the
respective  Holders upon receipt of a demand for payment therefor by the Trustee
to such Subsidiary Guarantor in writing.

         SECTION 11.07.  No Set-Off

         Each payment to be made by a Subsidiary  Guarantor hereunder in respect
of the Obligations  shall be payable in the currency or currencies in which such
Obligations are denominated,  and shall be made without  set-off,  counterclaim,
reduction or diminution of any kind or nature.

                                       87


         SECTION 11.08.  Obligations Absolute

         The obligations of each Subsidiary Guarantor hereunder are and shall be
absolute and  unconditional  and any monies or amounts  expressed to be owing or
payable by each Subsidiary Guarantor hereunder which may not be recoverable from
such Subsidiary  Guarantor on the basis of a Guarantee shall be recoverable from
such Subsidiary  Guarantor as a primary obligor and principal  debtor in respect
thereof.

         SECTION 11.09.  Obligations Continuing

         The  obligations  of  each  Subsidiary  Guarantor  hereunder  shall  be
continuing  and shall remain in full force and effect until all the  obligations
have been paid and satisfied in full. Each Subsidiary  Guarantor agrees with the
Trustee  that  it  will  from  time  to time  deliver  to the  Trustee  suitable
acknowledgments  of this  continued  liability  hereunder  and  under  any other
instrument or  instruments in such form as counsel to the Trustee may advise and
as will  prevent  any  action  brought  against  it in  respect  of any  default
hereunder  being barred by any statute of limitations  now or hereafter in force
and, in the event of the failure of a  Subsidiary  Guarantor so to do, it hereby
irrevocably  appoints  the Trustee  the  attorney  and agent of such  Subsidiary
Guarantor  to  make,   execute  and  deliver  such  written   acknowledgment  or
acknowledgments  or other  instruments as may from time to time become necessary
or advisable,  in the judgment of the Trustee on the advice of counsel, to fully
maintain and keep in force the liability of such Subsidiary Guarantor hereunder.

         SECTION 11.10.  Obligations Not Reduced

         The  obligations of each  Subsidiary  Guarantor  hereunder shall not be
satisfied,  reduced  or  discharged  solely by the  payment  of such  principal,
premium,  if any, interest,  fees and other monies or amounts as may at any time
prior to discharge of this Indenture pursuant to Article 8 be or become owing or
payable under or by virtue of or otherwise in connection  with the Notes or this
Indenture.

         SECTION 11.11.  Obligations Reinstated

         The obligations of each Subsidiary  Guarantor  hereunder shall continue
to be effective or shall be  reinstated,  as the case may be, if at any time any
payment which would  otherwise  have reduced the  obligations  of any Subsidiary
Guarantor  hereunder  (whether such payment shall have been made by or on behalf
of the Issuers or by or on behalf of a  Subsidiary  Guarantor)  is  rescinded or
reclaimed from any of the Holders upon the insolvency,  bankruptcy,  liquidation
or reorganization of either Issuer or any Subsidiary Guarantor or otherwise, all
as though such payment had not been made. If demand for, or  acceleration of the
time for,  payment by the  Issuers is stayed  upon the  insolvency,  bankruptcy,
liquidation or reorganization of either Issuer, all such Indebtedness  otherwise
subject to demand for payment or  acceleration  shall  nonetheless be payable by
each Subsidiary Guarantor as provided herein.

                                       88


         SECTION 11.12.  Obligations Not Affected

         The  obligations of each  Subsidiary  Guarantor  hereunder shall not be
affected,  impaired or  diminished  in any way by any act,  omission,  matter or
thing  whatsoever,  occurring  before,  upon or after  any  demand  for  payment
hereunder (and whether or not known or consented to by any Subsidiary  Guarantor
or any of the Holders) which,  but for this provision,  might constitute a whole
or partial  defense to a claim  against any  Subsidiary  Guarantor  hereunder or
might operate to release or otherwise  exonerate any  Subsidiary  Guarantor from
any of its obligations  hereunder or otherwise affect such obligations,  whether
occasioned  by default of any of the Holders or  otherwise,  including,  without
limitation:

                  (a) any limitation of status or power, disability,  incapacity
         or other  circumstance  relating to either  Issuer or any other person,
         including  any  insolvency,  bankruptcy,  liquidation,  reorganization,
         readjustment,  composition, dissolution, winding-up or other proceeding
         involving or affecting either Issuer or any other person;

                  (b) any irregularity,  defect,  unenforceability or invalidity
         in respect of any  indebtedness or other obligation of either Issuer or
         any other person under this Indenture,  the Notes or any other document
         or instrument;

                  (c) any failure of the Issuers,  whether or not without  fault
         on their part, to perform or comply with any of the  provisions of this
         Indenture  or the Notes,  or to give  notice  thereof  to a  Subsidiary
         Guarantor;

                  (d) the taking or  enforcing or  exercising  or the refusal or
         neglect  to take or  enforce or  exercise  any right or remedy  from or
         against the Issuers or any other person or their  respective  assets or
         the release or discharge of any such right or remedy;

                  (e) the granting of time, renewals,  extensions,  compromises,
         concessions, waivers, releases, discharges and other indulgences to the
         Issuers or any other Person;

                  (f) any change in the time,  manner or place of payment of, or
         in any  other  term  of,  any of the  Notes,  or any  other  amendment,
         variation,  supplement,  replacement  or waiver  of, or any  consent to
         departure from, any of the Notes or this Indenture,  including, without
         limitation,  any  increase or decrease  in the  principal  amount of or
         premium, if any, or interest on any of the Notes;

                  (g) any  change  in the  ownership,  control,  name,  objects,
         businesses,  assets, capital structure or constitution of either Issuer
         or a Subsidiary Guarantor;

                                       89


                  (h)  any  merger  or   amalgamation  of  either  Issuer  or  a
         Subsidiary Guarantor with any Person or Persons;

                  (i)  the  occurrence  of  any  change  in  the  laws,   rules,
         regulations or ordinances of any  jurisdiction by any present or future
         action  of any  governmental  authority  or  court  amending,  varying,
         reducing or otherwise  affecting,  or purporting to amend, vary, reduce
         or otherwise  affect,  any of the  Obligations or the  obligations of a
         Subsidiary Guarantor under its Guarantee; and

                  (j)  any  other   circumstance,   including   release  of  the
         Subsidiary Guarantor pursuant to Section 11.04 (other than by complete,
         irrevocable  payment)  that  might  otherwise  constitute  a  legal  or
         equitable  discharge or defense of the Issuers under this  Indenture or
         the Notes or of a  Subsidiary  Guarantor  in respect  of its  Guarantee
         hereunder.

         SECTION 11.13.  Waiver

         Without in any way limiting the  provisions  of Section  11.01  hereof,
each Subsidiary  Guarantor hereby waives notice of acceptance hereof,  notice of
any liability of any Subsidiary Guarantor hereunder, notice or proof of reliance
by the Holders upon the obligations of any Subsidiary Guarantor  hereunder,  and
diligence,  presentment,  demand for payment on the Issuers,  protest, notice of
dishonor  or  non-payment  of  any  of  the  Obligations,  or  other  notice  or
formalities to the Issuers or any Subsidiary Guarantor of any kind whatsoever.

         SECTION 11.14.  No Obligation To Take Action Against the Issuers

         Neither the Trustee nor any other Person shall have any  obligation  to
enforce or exhaust  any rights or  remedies or to take any other steps under any
security for the  Obligations  or against the Issuers or any other Person or any
Property  of the Issuers or any other  Person  before the Trustee is entitled to
demand  payment and  performance  by any or all  Subsidiary  Guarantors of their
liabilities and obligations under their Guarantees or under this Indenture.
         SECTION 11.15.  Dealing with the Issuers and Others

         The  Holders,  without  releasing,  discharging,  limiting or otherwise
affecting in whole or in part the  obligations and liabilities of any Subsidiary
Guarantor  hereunder  and  without  the  consent of or notice to any  Subsidiary
Guarantor, may

                  (a)   grant   time,   renewals,    extensions,    compromises,
         concessions, waivers, releases, discharges and other indulgences to the
         Issuers or any other Person;

                                       90


                  (b) take or abstain from taking  security or  collateral  from
         the Issuers or from perfecting security or collateral of the Issuers;

                  (c)  release,  discharge,   compromise,  realize,  enforce  or
         otherwise  deal  with or do any act or  thing  in  respect  of (with or
         without  consideration)  any and all  collateral,  mortgages  or  other
         security  given by the Issuers or any third  party with  respect to the
         obligations or matters contemplated by this Indenture or the Notes;

                  (d)      accept compromises or arrangements from the Issuers;

                  (e) apply all monies at any time  received from the Issuers or
         from any security upon such part of the  Obligations as the Holders may
         see fit or change any such application in whole or in part from time to
         time as the Holders may see fit; and

                  (f)  otherwise  deal with,  or waive or modify  their right to
         deal with,  the Issuers and all other  Persons and any  security as the
         Holders or the Trustee may see fit.

         SECTION 11.16.  Default and Enforcement

         If any  Subsidiary  Guarantor  fails to pay in accordance  with Section
11.06  hereof,  the Trustee may proceed in its name as trustee  hereunder in the
enforcement  of  the  Guarantee  of  any  such  Subsidiary  Guarantor  and  such
Subsidiary  Guarantor's  obligations  thereunder  and  hereunder  by any  remedy
provided by law, whether by legal proceedings or otherwise,  and to recover from
such Subsidiary Guarantor the obligations.

         SECTION 11.17.  Amendment, Etc

         No amendment, modification or waiver of any provision of this Indenture
relating  to  any  Subsidiary  Guarantor  or  consent  to any  departure  by any
Subsidiary  Guarantor  or any other Person from any such  provision  will in any
event be  effective  unless it is signed by such  Subsidiary  Guarantor  and the
Trustee.

         SECTION 11.18.  Acknowledgment

         Each Subsidiary  Guarantor  hereby  acknowledges  communication  of the
terms of this Indenture and the Notes and consents to and approves of the same.

         SECTION 11.19.  Costs and Expenses

         Each  Subsidiary  Guarantor  shall pay on demand by the Trustee any and
all costs, fees and expenses  (including,  without  limitation,  legal fees on a

                                       91


solicitor and client basis)  incurred by the Trustee,  its agents,  advisors and
counsel  or any of the  Holders  in  enforcing  any of their  rights  under  any
Guarantee.

         SECTION 11.20.  No Merger or Waiver; Cumulative Remedies

         No Guarantee  shall operate by way of merger of any of the  obligations
of  a  Subsidiary  Guarantor  under  any  other  agreement,  including,  without
limitation,  this Indenture.  No failure to exercise and no delay in exercising,
on the part of the Trustee or the Holders, any right, remedy, power or privilege
hereunder  or under  the  Indenture  or the  Notes,  shall  operate  as a waiver
thereof; nor shall any single or partial exercise of any right, remedy, power or
privilege  hereunder or under this  Indenture or the Notes preclude any other or
further  exercise thereof or the exercise of any other right,  remedy,  power or
privilege.  The rights,  remedies,  powers and  privileges  in the Guarantee and
under this Indenture,  the Notes and any other document or instrument  between a
Subsidiary Guarantor and/or either Issuer and the Trustee are cumulative and not
exclusive of any rights, remedies, powers and privilege provided by law.

         SECTION 11.21.  Survival of Obligations

         Without  prejudice to the survival of any of the other  obligations  of
each  Subsidiary  Guarantor  hereunder,   the  obligations  of  each  Subsidiary
Guarantor  under  Section  11.01  shall  survive  the  payment  in  full  of the
Obligations and shall be enforceable  against such Subsidiary  Guarantor without
regard  to and  without  giving  effect  to any  defense,  right  of  offset  or
counterclaim  available  to or  which  may be  asserted  by the  Company  or any
Subsidiary Guarantor.

         SECTION 11.22.  Guarantee in Addition to Other Obligations

         The  obligations of each  Subsidiary  Guarantor under its Guarantee and
this  Indenture  are in  addition  to and  not in  substitution  for  any  other
obligations  to the  Trustee  or to  any of the  Holders  in  relation  to  this
Indenture or the Notes and any guarantees or security at any time held by or for
the benefit of any of them.

         SECTION 11.23.  Severability

         Any   provision  of  this  Article   Eleven  which  is   prohibited  or
unenforceable in any jurisdiction shall not invalidate the remaining  provisions
and any such  prohibition  or  unenforceability  in any  jurisdiction  shall not
invalidate  or render  unenforceable  such  provision in any other  jurisdiction
unless its  removal  would  substantially  defeat the basic  intent,  spirit and
purpose of this Indenture and this Article Eleven.

         SECTION 11.24.  Successors and Assigns

         Each  Guarantee  shall be binding upon and inure to the benefit of each
Subsidiary  Guarantor and the Trustee and the other Holders and their respective

                                       92


successors and permitted assigns, except that no Subsidiary Guarantor may assign
any of its obligations hereunder or thereunder.

                                    [Remainder of Page Intentionally Left Blank]


                                       93





                                   SIGNATURES

         IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed, all as of the date first written above.


                          ABRAXAS PETROLEUM CORPORATION



                           By: /s/ CHRIS E. WILLIFORD
                            Name: Chris E. Williford
                            Title:  Executive Vice President, Chief
                                    Financial Officer and Treasurer


                       CANADIAN ABRAXAS PETROLEUM LIMITED


                           By: /s/ CHRIS E. WILLIFORD
                            Name: Chris E. Williford
                            Title: Vice President


                       IBJ SCHRODER BANK & TRUST COMPANY,
                        as Trustee


                          By: /s/ STEPHEN J. GIURLANDO
                           Name:  Stephen J. Giurlando
                           Title:  Assistant Vice President


                                       94









                                                                    EXHIBIT A

                                                               CUSIP No.:  [ ]

                          ABRAXAS PETROLEUM CORPORATION
                     11 1/2% SENIOR NOTE DUE 2004, SERIES C

No. [         ]                                                    $[ ]

         ABRAXAS  PETROLEUM  CORPORATION,  a Nevada  corporation,  and  CANADIAN
ABRAXAS PETROLEUM  LIMITED,  an Alberta  corporation (the "Issuers",  which term
includes any successor  entities),  for value received  promise to pay to [ ] or
registered assigns the principal sum of [ ] Dollars on November 1, 2004.

         Interest Payment Dates:  May 1 and November 1, commencing May 1, 1998

         Record Dates:  April 15 and October 15

         Reference  is made to the  further  provisions  of this Note  contained
herein, which will for all purposes have the same effect as if set forth at this
place.

         IN WITNESS  WHEREOF,  the  Issuers  have  caused this Note to be signed
manually or by  facsimile by their duly  authorized  officers and a facsimile of
their corporate seal to be affixed hereto or imprinted hereon.


                          ABRAXAS PETROLEUM CORPORATION


                          By:____________________________
                            Name:
                            Title:


                          CANADIAN ABRAXAS PETROLEUM LIMITED
  
                           By:___________________________
                            Name:
                            Title:



Dated:

Certificate of Authentication
                                      A-1



         This is one of the 11 1/2% Senior Notes due 2004,  Series C referred to
in the within-mentioned Indenture.

                        IBJ SCHRODER BANK & TRUST COMPANY
                        as Trustee

                        By:_____________________________
                        Authorized Signatory
Date of Authentication:

                                      A-2



                              (REVERSE OF SECURITY)

                     11 1/2% Senior Note due 2004, Series C

         (1) Interest. ABRAXAS PETROLEUM CORPORATION, a Nevada corporation,  and
CANADIAN  ABRAXAS  PETROLEUM  LIMITED,  an Alberta  corporation (the "Issuers"),
promise to pay  interest  on the  principal  amount of this Note at the rate per
annum shown  above.  Interest on the Notes will accrue from the most recent date
on which  interest has been paid or, if no interest has been paid,  from January
27,  1998.  The  Issuers  will pay  interest  semi-annually  in  arrears on each
Interest Payment Date,  commencing May 1, 1998. Interest will be computed on the
basis of a 360-day  year of twelve  30-day  months and, in the case of a partial
month, the actual number of days elapsed.

         The  Issuers  shall pay  interest on overdue  principal  and on overdue
installments  of  interest  from time to time on demand at the rate borne by the
Notes and on overdue  installments of interest (without regard to any applicable
grace periods) to the extent lawful.

         2.  Method of  Payment.  The  Issuers  shall pay  interest on the Notes
(except defaulted interest) to the Persons who are the registered Holders at the
close of business on the Record Date immediately  preceding the Interest Payment
Date even if the Notes are cancelled on registration of transfer or registration
of  exchange  (including  pursuant  to an  Exchange  Offer  (as  defined  in the
Registration  Rights  Agreement)) after such Record Date. Holders must surrender
Notes to a Paying Agent to collect  principal  payments.  The Issuers  shall pay
principal and interest in money of the United States that at the time of payment
is legal tender for payment of public and private debts ("U.S.  Legal  Tender").
However,  the Issuers may pay  principal  and interest by their check payable in
such U.S. Legal Tender. The Issuers may deliver any such interest payment to the
Paying Agent or to a Holder at the Holder's registered address.

         3. Paying Agent and  Registrar.  Initially,  IBJ Schroder  Bank & Trust
Company (the "Trustee") will act as Paying Agent and Registrar.  The Company may
change  any  Paying  Agent,  Registrar  or  co-Registrar  without  notice to the
Holders.

         4. Indenture. The Issuers issued the Notes under an Indenture, dated as
of January 27, 1998 (the "Indenture"),  among the Issuers and the Trustee.  This
Note  is one  of a  duly  authorized  issue  of  Initial  Notes  of the  Issuers
designated  as their 11 1/2%  Senior  Notes  due  2004,  Series C (the  "Initial
Notes").  The Notes are limited in aggregate  principal  amount to $275,000,000;
provided that $215,000,000 shall be reserved for issuance and shall be available
for issuance  only in  connection  with the exchange of the Series A/B Notes (as
defined in the  Indenture)  for Exchange  Notes.  The Notes  include the Initial
Notes and the  Exchange  Notes,  as defined  below,  issued in exchange  for the
Initial Notes and the Series A/B Notes (as defined in the Indenture) pursuant to
the Registration Rights Agreement.  The Initial Notes and the Exchange Notes are
treated as a single class of securities under the Indenture.  Capitalized  terms
herein are used as defined in the Indenture unless otherwise defined herein. The

                                      A-3


terms of the Notes  include those stated in the Indenture and those made part of
the  Indenture  by reference to the Trust  Indenture  Act of 1939 (15 U.S.  Code
ss.ss.  77aaa-77bbbb)  (the "TIA"),  as in effect on the date of the  Indenture.
Notwithstanding  anything to the contrary  herein,  the Notes are subject to all
such terms,  and Holders of Notes are referred to the Indenture and said Act for
a statement of them. The Notes are general unsecured obligations of the Issuers.

         5. Indenture.  Each Holder,  by accepting a Note, agrees to be bound by
all of the terms and  provisions  of the  Indenture,  as the same may be amended
from time to time in accordance with its terms.

         6. Redemption. The Notes will be redeemable, at the Issuers' option, in
whole at any time or in part from time to time,  on and after  November 1, 2000,
upon not less than 30 nor more than 60 days' notice, at the following Redemption
Prices  (expressed as percentages of the principal  amount  thereof) if redeemed
during the twelve-month  period  commencing on November 1 of the years set forth
below, plus, in each case,  accrued and unpaid interest,  if any, thereon to the
date of redemption:

                  Year                              Percentage

                  2000............................    105.750%
                  2001............................    102.875%
                  2002 and thereafter.............    100.000%
         At any time, or from time to time, on or prior to November 1, 1999, the
Issuers may, at their  option,  use all or a portion of the net cash proceeds of
one or more Equity  Offerings (as defined in the  Indenture) to redeem up to 35%
of the aggregate  original  principal  amount of the Notes at a Redemption Price
equal to 111.5% of the aggregate  principal  amount of the Notes to be redeemed,
plus accrued and unpaid  interest,  if any,  thereon to the date of  redemption;
provided,  however, that at least 65% of the aggregate original principal amount
of the Notes  remains  outstanding  immediately  after giving effect to any such
redemption (it being expressly  agreed that for purposes of determining  whether
this  condition  is  satisfied,  Notes  owned by  either  Issuer or any of their
Affiliates  shall be  deemed  not to be  outstanding).  In order to  effect  the
foregoing redemption with the proceeds of any Equity Offering, the Issuers shall
make such redemption not more than 60 days after the  consummation of any Equity
Offering.

         7. Notice of Redemption.  Notice of redemption  will be mailed at least
30 days but not more than 60 days before the  Redemption  Date to each Holder of
Notes to be redeemed at such Holder's registered address.
Notes in denominations larger than $1,000 may be redeemed in part.

         Except as set forth in the  Indenture,  if monies for the redemption of
the Notes called for redemption  shall have been deposited with the Paying Agent
for redemption on such Redemption Date, then,  unless the Issuers default in the
payment of such Redemption Price plus accrued interest, if any, the Notes called
for redemption  will cease to bear interest from and after such  Redemption Date
and the only right of the  Holders  of such Notes will be to receive  payment of
the Redemption Price plus accrued interest, if any.

                                      A-4



         8. Offers to Purchase.  Sections 4.15 and 4.16 of the Indenture provide
that,  after  certain  Asset  Sales (as defined in the  Indenture)  and upon the
occurrence of a Change of Control (as defined in the Indenture),  and subject to
further  limitations  contained  therein,  the  Issuers  will  make an  offer to
purchase certain amounts of the Notes  (including any Additional  Series D Notes
as defined in the Indenture) in accordance  with the procedures set forth in the
Indenture.

         9. Registration  Rights.  Pursuant to the Registration Rights Agreement
among the  Issuers  and the Initial  Purchaser,  the Issuers and the  Subsidiary
Guarantors  will be obligated to consummate an exchange  offer pursuant to which
the  Holder of this Note  shall  have the  right to  exchange  this Note for the
Issuers' 11 1/2% Senior Notes due 2004, Series D (the "Exchange  Notes"),  which
have been  registered  under the Securities  Act, in like  principal  amount and
having  terms  identical  in all  material  respects as the Initial  Notes.  The
Holders of the Initial  Notes shall be  entitled to receive  certain  additional
interest  payments in the event such exchange offer is not  consummated and upon
certain other  conditions,  all pursuant to and in accordance  with the terms of
the Registration Rights Agreement.

         10.  Denominations;  Transfer;  Exchange.  The Notes are in  registered
form,  without  coupons,  and (except  Notes  issued as payment of  Interest) in
denominations  of $1,000  and  integral  multiples  of  $1,000.  A Holder  shall
register the transfer of or exchange Notes in accordance with the Indenture. The
Registrar  may require a Holder,  among  other  things,  to furnish  appropriate
endorsements and transfer documents and to pay certain transfer taxes or similar
governmental  charges  payable  in  connection  therewith  as  permitted  by the
Indenture.  The  Registrar  need not register the transfer of or exchange of any
Notes or portions thereof selected for redemption.

         11.  Persons Deemed  Owners.  The registered  Holder of a Note shall be
treated as the owner of it for all purposes.

         12.  Unclaimed Money. If money for the payment of principal or interest
remains  unclaimed  for one year,  the Trustee and the Paying Agent will pay the
money back to the  Issuers.  After that,  all  liability of the Trustee and such
Paying Agent with respect to such money shall cease.

         13.  Discharge  Prior to Redemption or Maturity.  If the Issuers at any
time deposit with the Trustee U.S. Legal Tender or U.S.  Government  Obligations
sufficient  to pay the  principal of and interest on the Notes to  redemption or
maturity and comply with the other provisions of the Indenture relating thereto,
the Issuers will be discharged from certain  provisions of the Indenture and the
Notes (including certain covenants, but including,  under certain circumstances,
their  obligation  to pay the principal of and interest on the Notes but without
affecting the rights of the Holders to receive such amounts from such deposits).

         14. Amendment;  Supplement;  Waiver.  Subject to certain exceptions set
   
                                       A-5


forth  in  the  Indenture,  the  Indenture  or  the  Notes  may  be  amended  or
supplemented with the written consent of the Holders of not less than a majority
in  aggregate  principal  amount of the  Notes  then  outstanding,  and any past
Default or Event of Default or  noncompliance  with any  provision may be waived
with the written consent of the Holders of not less than a majority in aggregate
principal amount of the Notes then outstanding.  Without notice to or consent of
any Holder,  the parties  thereto may amend or  supplement  the Indenture or the
Notes to,  among other  things,  cure any  ambiguity,  defect or  inconsistency,
provide for  uncertificated  Notes in  addition  to or in place of  certificated
Notes,  comply with any  requirements  of the  Commission  in order to effect or
maintain the qualification of the Indenture under the TIA or comply with Article
Five of the  Indenture or make any other change that does not  adversely  affect
the rights of any Holder of a Note.

         15. Restrictive Covenants. The Indenture imposes certain limitations on
the ability of the  Issuers  and the  Restricted  Subsidiaries  to,  among other
things, incur additional Indebtedness, make payments in respect of their Capital
Stock or certain Indebtedness,  make certain Investments, create or incur liens,
enter into  transactions  with  Affiliates,  create  dividend  or other  payment
restrictions affecting Restricted  Subsidiaries,  issue Preferred Stock of their
Restricted Subsidiaries,  and on the ability of the Issuers and their Restricted
Subsidiaries  to merge or  consolidate  with any other  Person or sell,  assign,
transfer,  lease, convey or otherwise dispose of all or substantially all of the
Issuers'  and  their  Restricted   Subsidiaries'  assets  or  adopt  a  plan  of
liquidation.   Such   limitations   are   subject  to  a  number  of   important
qualifications  and exceptions.  Pursuant to Section 4.06 of the Indenture,  the
Issuer must annually report to the Trustee on compliance with such limitations.

         16.  Successors.  When a  successor  assumes,  in  accordance  with the
Indenture,  all the  obligations  of its  predecessor  under  the  Notes and the
Indenture, the predecessor, subject to certain exceptions, will be released from
those obligations.

         17.  Defaults  and  Remedies.  If an Event  of  Default  occurs  and is
continuing,  the  Trustee  or the  Holders  of not less  than  25% in  aggregate
principal  amount of Notes then  outstanding may declare all the Notes to be due
and  payable  in the  manner,  at the time and with the effect  provided  in the
Indenture. Holders of Notes may not enforce the Indenture or the Notes except as
provided in the Indenture. The Trustee is not obligated to enforce the Indenture
or the Notes unless it has received indemnity reasonably satisfactory to it. The
Indenture permits, subject to certain limitations therein provided, Holders of a
majority in aggregate  principal  amount of the Notes then outstanding to direct
the Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders of Notes notice of any continuing  Default or Event of Default (except a
Default  in payment  of  principal  or  interest  when due,  for any reason or a
Default in compliance  with Article Five of the Indenture) if it determines that
withholding notice is in their interest.

         18. Trustee Dealings with Issuers. The Trustee under the Indenture,  in
its individual or any other  capacity,  may become the owner or pledgee of Notes
and may otherwise deal with the Issuers,  their Subsidiaries or their respective

                                      A-6


Affiliates as if it were not the Trustee.

         19. No Recourse Against Others. No partner, director, officer, employee
or stockholder,  as such, of either Issuer or any Subsidiary Guarantor, as such,
shall have any liability for any  obligations of either Issuer or any Subsidiary
Guarantor  under the Notes,  the Indenture,  the Guarantees or the  Registration
Rights Agreement or for any claim based on, in respect of, or by reason of, such
obligations or their  creation.  Each Holder of Notes by accepting a Note waives
and  releases  all  such  liability.  The  waiver  and  release  are part of the
consideration for the issuance of the Notes.

         20.  Guarantees.  This Note will be entitled to the benefits of certain
Guarantees,  if any,  made for the benefit of the  Holders.  Reference is hereby
made to the Indenture for a statement of the respective  rights,  limitations of
rights,  duties and  obligations  thereunder of the Subsidiary  Guarantors,  the
Trustee and the Holders.

         21.  Authentication.  This Note shall not be valid until the Trustee or
Authenticating  Agent manually signs the certificate of  authentication  on this
Note.

         22. Governing Law. This Note and the Indenture shall be governed by and
construed in  accordance  with the laws of the State of New York,  as applied to
contracts  made and performed  within the State of New York,  without  regard to
principles of conflict of laws.  Each of the parties  hereto agrees to submit to
the  jurisdiction  of the  courts  of the  State  of New York in any  action  or
proceeding arising out of or relating to this Note.

         23.  Abbreviations  and Defined Terms.  Customary  abbreviations may be
used in the  name of a Holder  of a Note or an  assignee,  such  as:  TEN COM (=
tenants  in  common),  TEN ENT (= tenants  by the  entireties),  JT TEN (= joint
tenants  with  right of  survivorship  and not as tenants  in  common),  CUST (=
Custodian), and U/G/M/A (= Uniform Gifts to Minors Act).

         24. CUSIP  Numbers.  Pursuant to a  recommendation  promulgated  by the
Committee on Uniform Security Identification Procedures, the Issuers have caused
CUSIP numbers to be printed on the Notes as a convenience  to the Holders of the
Notes. No  representation  is made as to the accuracy of such numbers as printed
on the Notes and reliance may be placed only on the other identification numbers
printed hereon.

         The Issuers will  furnish to any Holder of a Note upon written  request
and  without  charge a copy of the  Indenture,  which has the text of this Note.
Requests  may be made to:  Abraxas  Petroleum  Corporation,  500 North Loop 1604
East, Suite 100, San Antonio, Texas 78232.


                                      A-7





                                 ASSIGNMENT FORM


         If you the Holder want to assign this Note,  fill in the form below and
have your signature guaranteed:


I or we assign and transfer this Note to:

_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________




                  (Print or type name, address and zip code and
                  social security or tax ID number of assignee)

and irrevocably  appoint _________,  agent to transfer this Note on the books of
the Issuers. The agent may substitute another to act for him.


Dated:________________      Signed:_________________________________________
                                     (Sign exactly as your name appears
                                        on the other side of this Note)

Signature Guarantee:_______________________________________________________


         In  connection  with any transfer of this Note  occurring  prior to the
date which is the earlier of (i) the date of the  declaration  by the Commission
of the  effectiveness  of a registration  statement  under the Securities Act of
1933, as amended (the  "Securities  Act")  covering  resales of this Note (which
effectiveness  shall not have been  suspended or  terminated  at the date of the
transfer) and (ii) January 27, 1999,  the  undersigned  confirms that it has not
utilized any general  solicitation or general advertising in connection with the
transfer:


                                      A-8




                                                     [Check One]

(1)      __ to the Issuers or a subsidiary thereof; or

(2)      __ pursuant to and in compliance with Rule 144A under the Securities
            Act of 1933, as amended; or

(3)      __ to an  institutional  "accredited  investor"  (as defined in Rule
            501(a)(1),  (2),  (3) or (7) under the  Securities  Act of 1933,  as
            amended)   that  has  furnished  to  the  Trustee  a  signed  letter
            containing certain representations and agreements (the form of which
            letter can be obtained from the Trustee); or

(4)      __ outside  the United  states to a "foreign  person" in  compliance
            with Rule 904 of Regulation S under the  Securities  Act of 1933, as
            amended; or

(5)      __ pursuant to the exemption from registration  provided by Rule 144
            under the Securities Act of 1933, as amended; or

(6)      __ pursuant  to  an  effective  registration  statement  under  the
            Securities Act of 1933, as amended; or

(7)      __ pursuant to another  available  exemption  from the  registration
            requirements of the Securities Act of 1933, as amended.

and unless the box below is checked,  the undersigned confirms that such Note is
not being  transferred  to an  "affiliate" of the Issuers as defined in Rule 144
under the Securities Act of 1933, as amended (an "Affiliate"):

         o        The transferee is an Affiliate of the Issuers.

Unless one of the items is checked,  the Trustee  will refuse to register any of
the Notes evidenced by this certificate in the name of any person other than the
registered Holder thereof; provided,  however, that if item (3), (4), (5) or (7)
is checked,  the Issuers or the Trustee may require,  prior to  registering  any
such  transfer  of the  Notes,  in their sole  discretion,  such  written  legal
opinions,  certifications (including an investment letter in the case of box (3)
or (4)) and other  information  as the  Trustee or the Issuers  have  reasonably
requested to confirm that such  transfer is being made  pursuant to an exemption
from, or in a transaction not subject to, the  registration  requirements of the
Securities Act of 1933, as amended.


                                      A-9




If none of the foregoing  items are checked,  the Trustee or Registrar shall not
be  obligated  to  register  this Note in the name of any person  other than the
Holder  hereof  unless  and  until  the  conditions  to  any  such  transfer  of
registration  set forth herein and in Section 2.17 of the  Indenture  shall have
been satisfied.


Dated:___________________    Signed:___________________________________
                                            (Sign exactly as name
                                             appears on the other side
                                             of this Note)


Signature Guarantee:_________________________________


              TO BE COMPLETED BY PURCHASER IF (2) ABOVE IS CHECKED

         The undersigned represents and warrants that it is purchasing this Note
for its own  account  or an account  with  respect  to which it  exercises  sole
investment  discretion  and  that  it  and  any  such  account  is a  "qualified
institutional buyer" within the meaning of Rule 144A under the Securities Act of
1933,  as amended  and is aware that the sale to it is being made in reliance on
Rule 144A and acknowledges  that it has received such information  regarding the
Issuers as the undersigned has requested pursuant to Rule 144A or has determined
not to request  such  information  and that it is aware that the  transferor  is
relying upon the undersigned's  foregoing  representations in order to claim the
exemption from registration provided by Rule 144A.


Dated:_______________       _________________________________________
                            NOTICE: To be executed by
                              an executive officer



                                      A-10




                      [OPTION OF HOLDER TO ELECT PURCHASE]


         If you  want to  elect  to have  this  Note  purchased  by the  Issuers
pursuant to Section 4.15 or Section 4.16
of the Indenture, check the appropriate box:

                           Section 4.15 [     ]
                           Section 4.16 [     ]

         If you want to elect to have only part of this  Note  purchased  by the
Issuers  pursuant to Section  4.15 or Section 4.16 of the  Indenture,  state the
amount you elect to have purchased:


$______________

Dated: __________________            ________________________________________
                                           NOTICE:   The  signature  on  this
                                           assignment  must  correspond  with
                                           the  name as it  appears  upon the
                                           face of the  within  Note in every
                                           particular  without  alteration or
                                           enlargement    or    any    change
                                           whatsoever and be guaranteed.


Signature Guarantee:__________________________________


                                      A-11








                                                                  EXHIBIT B
                                                             CUSIP No.:  [ ]

                          ABRAXAS PETROLEUM CORPORATION
                     11 1/2% SENIOR NOTE DUE 2004, SERIES D

No. [         ]                                                        $[ ]

         ABRAXAS  PETROLEUM  CORPORATION,  a Nevada  corporation,  and  CANADIAN
ABRAXAS PETROLEUM  LIMITED,  an Alberta  corporation (the "Issuers",  which term
includes any successor  entities),  for value received  promise to pay to [ ] or
registered assigns the principal sum of [ ] Dollars on November 1, 2004.

         Interest Payment Dates:  May 1 and November 1, commencing May 1, 1998

         Record Dates:  April 15 and October 15

         Reference  is made to the  further  provisions  of this Note  contained
herein, which will for all purposes have the same effect as if set forth at this
place.

         IN WITNESS  WHEREOF,  the  Issuers  have  caused this Note to be signed
manually or by  facsimile by their duly  authorized  officers and a facsimile of
their corporate seal to be affixed hereto or imprinted hereon.


                          ABRAXAS PETROLEUM CORPORATION


                          By:______________________________
                          Name:
                          Title:


                          CANADIAN ABRAXAS PETROLEUM LIMITED

                          By:______________________________
                          Name:
                          Title:



Dated:

Certificate of Authentication

                                      B-1


         This is one of the 11 1/2% Senior Notes due 2004,  Series D referred to
in the within-mentioned Indenture.

                                     IBJ SCHRODER BANK AND TRUST COMPANY,
                                       as Trustee

                                     By:______________________________
                                     Authorized Signatory
Date of Authentication:


                                      B-2





                              (REVERSE OF SECURITY)

                     11 1/2% Senior Note due 2004, Series D

         1. Interest. ABRAXAS PETROLEUM CORPORATION,  a Nevada corporation,  and
CANADIAN  ABRAXAS  PETROLEUM  LIMITED,  an Alberta  corporation (the "Issuers"),
promise to pay  interest  on the  principal  amount of this Note at the rate per
annum shown  above.  Interest on the Notes will accrue from the most recent date
on which  interest has been paid or, if no interest has been paid,  from January
27,  1998.  The  Issuers  will pay  interest  semi-annually  in  arrears on each
Interest Payment Date,  commencing May 1, 1998. Interest will be computed on the
basis of a 360-day  year of twelve  30-day  months and, in the case of a partial
month, the actual number of days elapsed.

         The  Issuers  shall pay  interest on overdue  principal  and on overdue
installments  of  interest  from time to time on demand at the rate borne by the
Notes and on overdue  installments of interest (without regard to any applicable
grace periods) to the extent lawful.

         2.  Method of  Payment.  The  Issuers  shall pay  interest on the Notes
(except defaulted interest) to the Persons who are the registered Holders at the
close of business on the Record Date immediately  preceding the Interest Payment
Date even if the Notes are cancelled on registration of transfer or registration
of exchange  after such Record Date.  Holders must  surrender  Notes to a Paying
Agent to  collect  principal  payments.  The  Issuers  shall pay  principal  and
interest  in money of the  United  States  that at the time of  payment is legal
tender for payment of public and private debts ("U.S.  Legal Tender").  However,
the Issuers may pay  principal  and interest by their check payable in such U.S.
Legal Tender.  The Issuers may deliver any such  interest  payment to the Paying
Agent or to a Holder at the Holder's registered address.

         3. Paying Agent and  Registrar.  Initially,  IBJ Schroder  Bank & Trust
Company (the "Trustee") will act as Paying Agent and Registrar.  The Company may
change  any  Paying  Agent,  Registrar  or  co-Registrar  without  notice to the
Holders.

         4. Indenture. The Issuers issued the Notes under an Indenture, dated as
of  January  27,  1998 (the  "Indenture"),  among the  Issuers,  the  Subsidiary
Guarantors  and the  Trustee.  This  Note is one of a duly  authorized  issue of
Exchange Notes of the Issuers designated as their 11 1/2% Senior Notes due 2004,
Series D (the "Exchange  Notes").  The Notes are limited in aggregate  principal
amount  to  $275,000,000;  provided  that  $215,000,000  shall be  reserved  for
issuance  and  shall be  available  for  issuance  only in  connection  with the
exchange  of the Series A/B Notes (as  defined in the  Indenture)  for  Exchange
Notes.  The Notes include the 11 1/2% Notes due 2004 (the  "Initial  Notes") and
the Exchange Notes,  issued in exchange for the Initial Notes and the Series A/B
Notes  (as  defined  in  the  Indenture)  pursuant  to the  Registration  Rights
Agreement.  The  Initial  Notes and the  Exchange  Notes are treated as a single
class of securities  under the Indenture.  Capitalized  terms herein are used as
defined in the Indenture unless otherwise defined herein. The terms of the Notes
include  those stated in the  Indenture  and those made part of the Indenture by

                                      B-3


reference to the Trust Indenture Act of 1939 (15 U.S. Code ss.ss.  77aaa-77bbbb)
(the "TIA"), as in effect on the date of the Indenture. Notwithstanding anything
to the contrary herein,  the Notes are subject to all such terms, and Holders of
Notes are referred to the  Indenture  and said Act for a statement of them.  The
Notes are general unsecured obligations of the Issuers.

         5. Indenture.  Each Holder,  by accepting a Note, agrees to be bound by
all of the terms and  provisions  of the  Indenture,  as the same may be amended
from time to time in accordance with its terms.

         6. Redemption. The Notes will be redeemable, at the Issuers' option, in
whole at any time or in part from time to time,  on and after  November 1, 2000,
upon not less than 30 nor more than 60 days' notice, at the following Redemption
Prices  (expressed as percentages of the principal  amount  thereof) if redeemed
during the twelve-month  period commencing on November 1 of the years set below,
plus, in each case, accrued and unpaid interest,  if any, thereon to the date of
redemption:

                  Year                             Percentage

                  2000...........................   105.750%
                  2001...........................   102.875%
                  2002 and thereafter............   100.000%

         At any time, or from time to time, on or prior to November 1, 1999, the
Issuers may, at their  option,  use all or a portion of the net cash proceeds of
one or more Equity  Offerings (as defined in the  Indenture) to redeem up to 35%
of the aggregate  original  principal  amount of the Notes at a Redemption Price
equal to 111.5% of the aggregate  principal  amount of the Notes to be redeemed,
plus accrued and unpaid  interest,  if any,  thereon to the date of  redemption;
provided,  however, that at least 65% of the aggregate original principal amount
of the Notes  remains  outstanding  immediately  after giving effect to any such
redemption (it being expressly  agreed that for purposes of determining  whether
this  condition  is  satisfied,  Notes  owned by  either  Issuer or any of their
Affiliates  shall be  deemed  not to be  outstanding).  In order to  effect  the
foregoing redemption with the proceeds of any Equity Offering, the Issuers shall
make such redemption not more than 60 days after the  consummation of any Equity
Offering.

         7. Notice of Redemption.  Notice of redemption  will be mailed at least
30 days but not more than 60 days before the  Redemption  Date to each Holder of
Notes to be redeemed at such Holder's registered address.
Notes in denominations larger than $1,000 may be redeemed in part.

         Except as set forth in the  Indenture,  if monies for the redemption of
the Notes called for redemption  shall have been deposited with the Paying Agent
for redemption on such Redemption Date, then,  unless the Issuers default in the
payment of such Redemption Price plus accrued interest, if any, the Notes called
for redemption  will cease to bear interest from and after such  Redemption Date
and the only right of the  Holders  of such Notes will be to receive  payment of
the Redemption Price plus accrued interest, if any.

                                      B-4


         8. Offers to Purchase.  Sections 4.15 and 4.16 of the Indenture provide
that,  after  certain  Asset  Sales (as defined in the  Indenture)  and upon the
occurrence of a Change of Control (as defined in the Indenture),  and subject to
further  limitations  contained  therein,  the  Issuers  will  make an  offer to
purchase certain amounts of the Notes  (including any Additional  Series D Notes
(as defined in the  Indenture))  in accordance  with the procedures set forth in
the Indenture.

         9. Denominations; Transfer; Exchange. The Notes are in registered form,
without   coupons,   and  (except  Notes  issued  as  payment  of  Interest)  in
denominations  of $1,000  and  integral  multiples  of  $1,000.  A Holder  shall
register the transfer of or exchange Notes in accordance with the Indenture. The
Registrar  may require a Holder,  among  other  things,  to furnish  appropriate
endorsements and transfer documents and to pay certain transfer taxes or similar
governmental  charges  payable  in  connection  therewith  as  permitted  by the
Indenture.  The  Registrar  need not register the transfer of or exchange of any
Notes or portions thereof selected for redemption.

         10.  Persons Deemed  Owners.  The registered  Holder of a Note shall be
treated as the owner of it for all purposes.

         11.  Unclaimed Money. If money for the payment of principal or interest
remains  unclaimed  for one year,  the Trustee and the Paying Agent will pay the
money back to the  Issuers.  After that,  all  liability of the Trustee and such
Paying Agent with respect to such money shall cease.

         12.  Discharge  Prior to Redemption or Maturity.  If the Issuers at any
time deposit with the Trustee U.S. Legal Tender or U.S.  Government  Obligations
sufficient to pay the  principal of and interest on the Notes to redemption  and
comply with the other provisions of the Indenture relating thereto,  the Issuers
will be  discharged  from  certain  provisions  of the  Indenture  and the Notes
(including  certain covenants,  including,  under certain  circumstances,  their
obligation  to pay the  principal  of and  interest  on the  Notes  but  without
affecting the rights of the Holders to receive such amounts from such deposit).

         13. Amendment;  Supplement;  Waiver.  Subject to certain exceptions set
forth  in  the  Indenture,  the  Indenture  or  the  Notes  may  be  amended  or
supplemented with the written consent of the Holders of not less than a majority
in  aggregate  principal  amount of the  Notes  then  outstanding,  and any past
Default or Event of Default or  noncompliance  with any  provision may be waived
with the written consent of the Holders of not less than a majority in aggregate
principal amount of the Notes then outstanding.  Without notice to or consent of
any Holder,  the parties  thereto may amend or  supplement  the Indenture or the
Notes to,  among other  things,  cure any  ambiguity,  defect or  inconsistency,
provide for  uncertificated  Notes in  addition  to or in place of  certificated
Notes,  comply with any  requirements  of the  Commission  in order to effect or
maintain the qualification of the Indenture under the TIA or comply with Article
Five of the  Indenture or make any other change that does not  adversely  affect
the rights of any Holder of a Note.

                                      B-5


         14. Restrictive Covenants. The Indenture imposes certain limitations on
the ability of the  Issuers  and the  Restricted  Subsidiaries  to,  among other
things, incur additional Indebtedness, make payments in respect of their Capital
Stock or certain Indebtedness,  make certain Investments, create or incur liens,
enter into  transactions  with  Affiliates,  create  dividend  or other  payment
restrictions affecting Restricted  Subsidiaries,  issue Preferred Stock of their
Restricted Subsidiaries,  and on the ability of the Issuers and their Restricted
Subsidiaries  to merge or  consolidate  with any other  Person or sell,  assign,
transfer,  lease, convey or otherwise dispose of all or substantially all of the
Issuers'  and  their  Restricted   Subsidiaries'  assets  or  adopt  a  plan  of
liquidation.   Such   limitations   are   subject  to  a  number  of   important
qualifications  and exceptions.  Pursuant to Section 4.06 of the Indenture,  the
Issuers must annually report to the Trustee on compliance with such limitations.

         15.  Successors.  When a  successor  assumes,  in  accordance  with the
Indenture,  all the  obligations  of its  predecessor  under  the  Notes and the
Indenture, the predecessor, subject to certain exceptions, will be released from
those obligations.

         16.  Defaults  and  Remedies.  If an Event  of  Default  occurs  and is
continuing,  the  Trustee  or the  Holders  of not less  than  25% in  aggregate
principal  amount of Notes then  outstanding may declare all the Notes to be due
and  payable  in the  manner,  at the time and with the effect  provided  in the
Indenture. Holders of Notes may not enforce the Indenture or the Notes except as
provided in the Indenture. The Trustee is not obligated to enforce the Indenture
or the Notes unless it has received indemnity reasonably satisfactory to it. The
Indenture permits, subject to certain limitations therein provided, Holders of a
majority in aggregate  principal  amount of the Notes then outstanding to direct
the Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders of Notes notice of any continuing  Default or Event of Default (except a
Default  in payment  of  principal  or  interest  when due,  for any reason or a
Default in compliance  with Article Five of the Indenture) if it determines that
withholding notice is in their interest.

         17. Trustee Dealings with Issuers. The Trustee under the Indenture,  in
its individual or any other  capacity,  may become the owner or pledgee of Notes
and may otherwise deal with the Issuers,  their Subsidiaries or their respective
Affiliates as if it were not the Trustee.

         18. No Recourse Against Others. No partner, director, officer, employee
or stockholder,  as such, of either Issuer or any Subsidiary Guarantor, as such,
shall have any liability for any  obligations of either Issuer or any Subsidiary
Guarantor  under the Notes,  the Indenture,  the Guarantees or the  Registration
Rights Agreement or for any claim based on, in respect of, or by reason of, such
obligations or their  creation.  Each Holder of Notes by accepting a Note waives
and  releases  all  such  liability.  The  waiver  and  release  are part of the
consideration for the issuance of the Notes.

         19.  Guarantees.  This Note will be entitled to the benefits of certain
Guarantees,  if any,  made for the benefit of the  Holders.  Reference is hereby

                                      B-6


made to the Indenture for a statement of the respective  rights,  limitations of
rights,  duties and  obligations  thereunder of the Subsidiary  Guarantors,  the
Trustee and the Holders.

         20.  Authentication.  This Note shall not be valid until the Trustee or
Authenticating  Agent manually signs the certificate of  authentication  on this
Note.

         21. Governing Law. This Note and the Indenture shall be governed by and
construed in  accordance  with the laws of the State of New York,  as applied to
contracts  made and performed  within the State of New York,  without  regard to
principles of conflict of laws.  Each of the parties  hereto agrees to submit to
the  jurisdiction  of the  courts  of the  State  of New York in any  action  or
proceeding arising out of or relating to this Note.

         22.  Abbreviations  and Defined Terms.  Customary  abbreviations may be
used in the  name of a Holder  of a Note or an  assignee,  such  as:  TEN COM (=
tenants  in  common),  TEN ENT (= tenants  by the  entireties),  JT TEN (= joint
tenants  with  right of  survivorship  and not as tenants  in  common),  CUST (=
Custodian), and U/G/M/A (= Uniform Gifts to Minors Act).

         23. CUSIP  Numbers.  Pursuant to a  recommendation  promulgated  by the
Committee on Uniform Security Identification Procedures, the Issuers have caused
CUSIP numbers to be printed on the Notes as a convenience  to the Holders of the
Notes. No  representation  is made as to the accuracy of such numbers as printed
on the Notes and reliance may be placed only on the other identification numbers
printed hereon.

         The Issuers will  furnish to any Holder of a Note upon written  request
and  without  charge a copy of the  Indenture,  which has the text of this Note.
Requests  may be made to:  Abraxas  Petroleum  Corporation,  500 North Loop 1604
East, Suite 100, San Antonio, Texas 78232.


                                      B-7




                                 ASSIGNMENT FORM


         If you the Holder want to assign this Note,  fill in the form below and
have your signature guaranteed:


I or we assign and transfer this Note to:

____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
                  (Print or type name, address and zip code and
                  social security or tax ID number of assignee)


and irrevocably appoint_____________________________________________________, 
agent  to  transfer  this  Note on the  books  of the  Issuers.  The  agent  may
substitute another to act for him.


Dated:_____________              Signed:___________________________
                                 (Sign exactly as name appears
                                 on the other side of this Note)


Signature Guarantee:______________________________________________________


                                      B-8




                      [OPTION OF HOLDER TO ELECT PURCHASE]


         If you  want to  elect  to have  this  Note  purchased  by the  Issuers
pursuant to Section 4.15 or Section 4.16 of the Indenture, check the appropriate
box:

                           Section 4.15 [     ]
                           Section 4.16 [     ]

         If you want to elect to have only part of this  Note  purchased  by the
Issuers  pursuant to Section  4.15 or Section 4.16 of the  Indenture,  state the
amount you elect to have purchased:


$_______________________

Dated: _________________                ______________________________________
                                        NOTICE:   The   signature  on  this
                                        assignment must correspond with the
                                        name as it appears upon the face of
                                        the within Note in every particular
                                        without  alteration or  enlargement
                                        or  any  change  whatsoever  and be
                                        guaranteed.


Signature Guarantee:_____________________________


                                      B-9






                                                           EXHIBIT C

                            Form of Certificate To Be
                          Delivered in Connection with
                    Transfers to Non-QIB Accredited Investors

                                                              [ ], [    ]

[                        ]
[                        ]
[                        ]

Ladies and Gentlemen:

         In  connection  with our proposed  purchase of 11 1/2% Senior Notes due
2004 (the "Notes") of Abraxas  Petroleum  Corporation  ("Abraxas")  and Canadian
Abraxas Petroleum Limited ("Canadian Abraxas"), we confirm that:

                  I. We have  received a copy of the  Offering  Memorandum  (the
         "Offering  Memorandum"),  dated January 20, 1998, relating to the Notes
         and such other  information  as we deem  necessary in order to make our
         investment decision. We acknowledge that we have read and agreed to the
         matters  stated in the section  entitled  "Notice to Investors" of such
         Offering Memorandum.

                  2. We understand that any subsequent  transfer of the Notes is
         subject  to  certain  restrictions  and  conditions  set  forth  in the
         indenture  relating to the Notes (the  "Indenture") as described in the
         Offering  Memorandum and the undersigned agrees to be bound by, and not
         to resell,  pledge or otherwise transfer the Notes except in compliance
         with, such  restrictions and conditions and the Securities Act of 1933,
         as amended (the "Securities  Act"), and all applicable State securities
         laws.

                  3. We understand that the offer and sale of the Notes have not
         been registered under the Securities Act, and that the Notes may not be
         offered or sold  within the United  States or to, or for the account or
         benefit of, U.S. persons except as permitted in the following sentence.
         We agree,  on our own behalf and on behalf of any accounts for which we
         are acting as hereinafter  stated, that if we should sell any Notes, we
         will do so only (i) to  Abraxas,  Canadian  Abraxas  or any  subsidiary
         thereof,  (ii) inside the United  States in  accordance  with Rule 144A
         under the  Securities  Act to a  "qualified  institutional  buyer"  (as
         defined in Rule 144A promulgated  under the Securities Act) that, prior
         to such  transfer,  furnishes (or has furnished on its behalf by a U.S.
         broker-dealer)  to the Trustee (as defined in the  Indenture)  a signed
         letter containing certain  representations  and agreements  relating to

                                      C-1


         the restrictions on transfer of the Notes (the form of which letter can
         be obtained  from the  Trustee),  (iii)  outside  the United  States in
         accordance  with  Rule  904  of  Regulation  S  promulgated  under  the
         Securities Act (provided that any such sale or transfer in Canada or to
         or for the benefit of a Canadian  resident must be effected pursuant to
         an exemption from the prospectus and  registration  requirements  under
         applicable  Canadian  securities  laws), (iv) pursuant to the exemption
         from  registration  provided by Rule 144 under the  Securities  Act (if
         available),  or (v)  pursuant to an  effective  registration  statement
         under the Securities Act, and we further agree to provide to any person
         purchasing  any of the Notes from us a notice  advising such  purchaser
         that resales of the Notes are restricted as stated herein.

                  4. We understand that, on any proposed resale of any Notes, we
         will be  required  to  furnish to the  Trustee,  Abraxas  and  Canadian
         Abraxas such certification, legal opinions and other information as the
         Trustee and Abraxas may reasonably require to confirm that the proposed
         sale complies with the foregoing  restrictions.  We further  understand
         that the Notes  purchased  by us will  bear a legend  to the  foregoing
         effect.

                  5. We are an institutional  "accredited  investor" (as defined
         in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities
         Act) and have such  knowledge and  experience in financial and business
         matters  as to be  capable  of  evaluating  the merits and risks of our
         investment  in the  Notes,  and we and any  accounts  for  which we are
         acting  are  each  able  to bear  the  economic  risk  of our or  their
         investment, as the case may be.

                  6. We are acquiring the Notes  purchased by us for our account
         or for  one  or  more  accounts  (each  of  which  is an  institutional
         "accredited  investor") as to each of which we exercise sole investment
         discretion.

                  You,  Abraxas,  Canadian  Abraxas,  the Trustee and others are
entitled to rely upon this letter and are irrevocably authorized to produce this
letter or a copy hereof to any interested party in any  administrative  or legal
proceeding or official inquiry with respect to the matters covered hereby.

                                            Very truly yours,

                                           [Name of Transferee]




                                           By:_____________________
                                            Name:
                                            Title:


                                      C-2





                                                               EXHIBIT D

                       Form of Certificate To Be Delivered
                          in Connection with Transfers
                            Pursuant to Regulation S

                                                                [ ], [    ]

[                  ]
[                  ]
[                  ]
[                  ]



         Re:      Abraxas Petroleum Corporation
                  Canadian Abraxas Petroleum Limited (the "Issuers")
                  11 1/2% Senior Notes due 2004 (the "Notes")

Ladies and Gentlemen:

         In connection with our proposed sale of $[ ] aggregate principal amount
of the Notes,  we confirm  that such sale has been  effected  pursuant to and in
accordance with  Regulation S under the U.S.  Securities Act of 1933, as amended
(the "Securities Act"), and, accordingly, we represent that:

                  (1) the  offer of the  Notes  was not made to a person  in the
         United States;

                  (2) either (a) at the time the buy offer was  originated,  the
         transferee was outside the United States or we and any person acting on
         our behalf  reasonably  believed  that the  transferee  was outside the
         United States,  or (b) the  transaction  was executed in, on or through
         the facilities of a designated  off-shore securities market and neither
         we nor any person acting on our behalf knows that the  transaction  has
         been pre-arranged with a buyer in the United States;

                  (3) no directed  selling  efforts have been made in the United
         States in  contravention  of the  requirements  of Rule  903(b) or Rule
         904(b) of Regulation S, as applicable;

                  (4) the  transaction  is not part of a plan or scheme to evade
         the registration requirements of the Securities Act; and

                  (5)  we  have   advised  the   transferee   of  the   transfer
restrictions applicable to the Notes.

                  You,  the Issuers and counsel for the Issuers are  entitled to

                                      D-1


rely upon this letter and are irrevocably authorized to produce this letter or a
copy hereof to any interested party in any  administrative  or legal proceedings
or official  inquiry with respect to the matters covered  hereby.  Terms used in
this certificate have the meanings set forth in Regulation S.

                                           Very truly yours,

                                          [Name of Transferor]


                                          By:______________________________
                                           Authorized Signature



                                      D-2


                                                               EXHIBIT E


                                    GUARANTEE


         For value received, the undersigned hereby unconditionally  guarantees,
as  principal  obligor and not only as a surety,  to the Holder of this Note the
cash payments in United States  dollars of principal  of,  premium,  if any, and
interest on this Note (and including Additional Interest payable thereon) in the
amounts  and at the  times  when  due and  interest  on the  overdue  principal,
premium, if any, and interest,  if any, of this Note, if lawful, and the payment
or  performance  of all other  obligations of the Issuers under the Indenture or
the Notes,  to the Holder of this Note and the Trustee,  all in accordance  with
and subject to the terms and  limitations  of this Note,  Article  Eleven of the
Indenture and this Guarantee. This Guarantee will become effective in accordance
with Article  Eleven of the Indenture and its terms shall be evidenced  therein.
The validity and  enforceability  of any Guarantee  shall not be affected by the
fact that it is not affixed to any particular Note.  Capitalized  terms used but
not defined  herein  shall have the meanings  ascribed to them in the  Indenture
dated as of January 27, 1998,  among  Abraxas  Petroleum  Corporation,  a Nevada
corporation,  and Canadian Abraxas Petroleum Limited, an Alberta corporation, as
issuers (the  "Issuers") and IBJ Schroder Bank & Trust Company,  as trustee (the
"Trustee"), as amended or supplemented (the "Indenture").

         The  obligations of the  undersigned to the Holders of Notes and to the
Trustee  pursuant to this Guarantee and the Indenture are expressly set forth in
Article  Eleven of the  Indenture  and reference is hereby made to the Indenture
for the precise terms of the  Guarantee  and all of the other  provisions of the
Indenture to which this Guarantee relates.

         THIS GUARANTEE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE  WITH,
THE  LAWS OF THE  STATE OF NEW YORK  WITHOUT  GIVING  EFFECT  TO  PRINCIPLES  OF
CONFLICTS  OF LAW.  Each  Subsidiary  Guarantor  hereby  agrees to submit to the
jurisdiction  of the courts of the State of New York in any action or proceeding
arising out of or relating to this Guarantee.

         This  Guarantee  is subject to release  upon the terms set forth in the
Indenture.


                                      E-1


         IN WITNESS WHEREOF,  each Subsidiary Guarantor has caused its Guarantee
to be duly executed.


Date:  ____________________

                               [NAME OF SUBSIDIARY GUARANTOR], as
                                Guarantor


                               By:______________________________________
                                Name:
                                Title:


                               By:______________________________________
                                Name:
                                Title:





                                      E-2


                                                                EXHIBIT 10.1
                          ABRAXAS PETROLEUM CORPORATION
                       CANADIAN ABRAXAS PETROLEUM LIMITED
                                   $60,000,000
                          11 1/2% Senior Notes due 2004


                               PURCHASE AGREEMENT



                                                             January 20, 1998

JEFFERIES & COMPANY INC.
909 Fannin, Suite 3100
Houston, TX 77010

Ladies and Gentlemen:

         Abraxas Petroleum  Corporation,  a Nevada  corporation (the "Company"),
and  Canadian  Abraxas  Petroleum   Limited,   an  Alberta   corporation  and  a
wholly-owned subsidiary of the Company ("Canadian Abraxas" and together with the
Company,  the "Issuers"),  hereby confirm their agreement with you (the "Initial
Purchaser") as set forth below.

         1.  The  Securities.   Subject  to  the  terms  and  conditions  herein
contained,  the  Issuers  propose  to issue  and sell to the  Initial  Purchaser
$60,000,000  aggregate  principal  amount of their 11 1/2% Senior Notes due 2004
(the "Notes"). The Notes will be guaranteed (collectively,  the "Guarantees") on
a senior  basis by each of the  Company's  future  Restricted  Subsidiaries  (as
defined in the Indenture) (collectively, the "Subsidiary Guarantors"). The Notes
and the Guarantees are collectively referred to herein as the "Securities".  The
Notes are to be issued under an indenture  (the  "Indenture")  to be dated as of
January 27, 1998 by and among the Issuers and IBJ Schroder Bank & Trust Company,
as Trustee (the "Trustee").

         The  Securities  will be  offered  and  sold to the  Initial  Purchaser
without  being  registered  under the  Securities  Act of 1933,  as amended (the
"Act"), in reliance on exemptions therefrom.

         In  connection  with  the  sale of the  Securities,  the  Issuers  have
prepared  a final  offering  memorandum  dated  January  20,  1998  (the  "Final
Memorandum"  or  "Memorandum")  setting forth or including a description  of the

                                       1


terms  of the  Securities,  the  terms  of the  offering  of the  Securities,  a
description  of the  Issuers  and the  Subsidiary  Guarantors  and any  material
developments  relating to the Issuers and the  Subsidiary  Guarantors  occurring
after  the date of the most  recent  historical  financial  statements  included
therein.

         The Initial  Purchaser and its direct and indirect  transferees  of the
Securities will be entitled to the benefits of the Registration Rights Agreement
to be dated  as of the  Closing  Date (as  defined)  (the  "Registration  Rights
Agreement"),  pursuant to which the Issuers will agree,  among other things,  to
file with the Securities and Exchange Commission (the  "Commission"),  under the
circumstances set forth therein, (i) a registration statement under the Act (the
"Exchange Offer Registration  Statement"),  relating to Senior Notes due 2004 of
the Issuers  (the  "Exchange  Notes") to be offered in exchange  (the  "Exchange
Offer")  for  the  Notes,  and  (ii)  as  and  to  the  extent  required  by the
Registration Rights Agreement,  a shelf registration  statement pursuant to Rule
415 under the Act (the "Shelf  Registration  Statement"  and,  together with the
Exchange Offer Registration Statement, the "Registration Statements"),  relating
to the resale by certain holders of the Notes,  and to use their best efforts to
cause such  Registration  Statements  to be declared  effective.  This  Purchase
Agreement (this "Agreement"),  the Notes, the Guarantees,  the Indenture and the
Registration  Rights  Agreement are hereinafter  referred to collectively as the
"Operative Documents."

         2. Representations and Warranties.  The Issuers, jointly and severally,
represent and warrant to and agree with the Initial Purchaser that:

                  (a)  Neither  the  Final   Memorandum  nor  any  amendment  or
         supplement  thereto as of the date thereof and at all times  subsequent
         thereto  up to the  Closing  Date  (as  defined  in  Section  3  below)
         contained  or  contains  any untrue  statement  of a  material  fact or
         omitted  or  omits  to  state a  material  fact  necessary  to make the
         statements  therein, in the light of the circumstances under which they
         were  made,  not  misleading,   except  that  the  representations  and
         warranties set forth in this Section 2(a) do not apply to statements or
         omissions  made in reliance  upon and in  conformity  with  information
         relating to the Initial  Purchaser  furnished to the Issuers in writing
         by the Initial  Purchaser  expressly for use in the Final Memorandum or
         any amendment or supplement thereto.

                  (b) As of September 30, 1997, the Company had the  authorized,
         issued  and   outstanding   capitalization   set  forth  in  the  Final
         Memorandum;  all of the  subsidiaries  of the  Company  are  listed  on
         Schedule I attached hereto (each, a "Subsidiary" and collectively,  the
         "Subsidiaries");  all of the outstanding shares of capital stock of the
         Issuers and of each of the  Subsidiaries  of the Company have been, and
         as of the Closing Date will be, duly authorized and validly issued, are
         fully paid and  nonassessable  and were not issued in  violation of any
         preemptive or similar rights;  all of the outstanding shares of capital

                                       2


         stock of Canadian Abraxas and of each of the  Subsidiaries  (other than
         with respect to the shares of capital  stock of Cascade Oil & Gas Ltd.,
         an Alberta  corporation  ("Cascade"),  and  Western  Associated  Energy
         Corporation,  a Texas corporation  ("Western"),  such shares of capital
         stock  owned by others as of the  Closing  Date and as set forth in the
         Final  Memorandum  or in this  Agreement)  will be owned by the Company
         free and  clear of all  liens,  encumbrances,  equities  and  claims or
         restrictions  on  transferability  (other than those imposed by the Act
         and the  securities  or "Blue  Sky" laws of certain  jurisdictions)  or
         voting, except for the liens created by the Credit Facility (as defined
         herein);  except as set forth in the Final Memorandum,  as of September
         30,  1997,  there  were no (i)  options,  warrants  or other  rights to
         purchase,  (ii) agreements or other obligations of the Issuers to issue
         or (iii) other rights to convert any  obligation  into, or exchange any
         securities  for,  shares of capital stock of or ownership  interests in
         either Issuer or any of the  Subsidiaries  outstanding.  Except for the
         Subsidiaries  and as  disclosed  in the Final  Memorandum,  none of the
         Issuers or any of the Subsidiaries  owns,  directly or indirectly,  any
         shares  of  capital  stock  or  any  other  equity  or  long-term  debt
         securities or have any equity interest in any firm, partnership,  joint
         venture or other entity.

                  (c)  Each  of  the  Issuers  and  the   Subsidiaries  is  duly
         incorporated,  validly  existing and in good standing under the laws of
         its  respective  jurisdiction  of  incorporation  and has all requisite
         corporate  power and  authority to own its  properties  and conduct its
         business as now  conducted  and as described  in the Final  Memorandum;
         each of the  Issuers  and the  Subsidiaries  is  duly  qualified  to do
         business  as a  foreign  corporation  in  good  standing  in all  other
         jurisdictions  where the ownership or leasing of its  properties or the
         conduct of its business requires such  qualification,  except where the
         failure to be so qualified would not, individually or in the aggregate,
         have a material  adverse  effect on the  general  affairs,  management,
         business,  condition (financial or otherwise),  prospects or results of
         operations  of the Issuers and the  Subsidiaries  taken as a whole (any
         such event, a "Material Adverse Effect").

                  (d) Each of the Issuers and the Subsidiaries has all requisite
         corporate  power and  authority  to  execute,  deliver  and perform its
         respective  obligations  under this  Agreement and the other  Operative
         Documents  to which it is a party and to  consummate  the  transactions
         contemplated hereby and thereby,  including,  without  limitation,  the
         power and  authority  to issue,  sell and  deliver  the  Securities  as
         contemplated by this Agreement.

                  (e) This  Agreement  has been  duly  and  validly  authorized,
         executed and delivered by each of the Issuers.

                  (f) The Indenture has been duly and validly  authorized by the

                                       3


         Issuers and, when duly  executed and  delivered in accordance  with its
         terms (assuming the due execution and delivery thereof by the Trustee),
         will  be the  valid  and  legally  binding  agreement  of the  Issuers,
         enforceable  against each of them in accordance with its terms,  except
         as  such  enforceability  may be  limited  by  bankruptcy,  insolvency,
         reorganization, moratorium and other similar laws now or hereinafter in
         effect relating to or affecting creditors' rights generally, by general
         equitable  principles  (regardless  of whether such  enforceability  is
         considered  in a  proceeding  in equity or at law);  and the  Indenture
         meets the requirements for qualification  under the Trust Indenture Act
         of 1939, as amended (the "TIA").

                  (g) The  Notes  have  been  duly and  validly  authorized  for
         issuance and sale to the Initial  Purchaser by the Issuers  pursuant to
         this Agreement and, when issued and  authenticated  in accordance  with
         the terms of the Indenture and delivered  against  payment  therefor in
         accordance with the terms hereof, will be the legally valid and binding
         obligations  of the  Issuers,  enforceable  against  each  of  them  in
         accordance  with  their  terms  and  entitled  to the  benefits  of the
         Indenture,  except as such enforceability may be limited by bankruptcy,
         insolvency,  reorganization,  moratorium  and other similar laws now or
         hereinafter  in  effect  relating  to or  affecting  creditors'  rights
         generally,  by general equitable principles (regardless of whether such
         enforceability  is  considered  in a proceeding in equity or at law) or
         the discretion of the court before which any proceeding therefor may be
         brought.

                  (h) The Exchange  Notes have been duly and validly  authorized
         for  issuance by the Issuers  and,  when  issued and  authenticated  in
         accordance  with the terms of the Indenture,  the  Registration  Rights
         Agreement and the Exchange Offer, will be the legally valid and binding
         obligations  of the  Issuers,  enforceable  against  each  of  them  in
         accordance  with  their  terms  and  entitled  to the  benefits  of the
         Indenture,  except as such enforceability may be limited by bankruptcy,
         insolvency,  reorganization,  moratorium  and other similar laws now or
         hereinafter  in  effect  relating  to or  affecting  creditors'  rights
         generally,  by general equitable principles (regardless of whether such
         enforceability  is  considered  in a proceeding in equity or at law) or
         the discretion of the court before which any proceeding therefor may be
         brought.

                  (i) The Registration Rights Agreement has been duly authorized
         by the Issuers and,  when duly  executed  and  delivered by the Issuers
         (assuming  the  due  execution  and  delivery  thereof  by the  Initial
         Purchaser),  will be the legally  valid and binding  obligation  of the
         Issuers, enforceable against each of them in accordance with its terms,
         except as such enforceability may be limited by bankruptcy, insolvency,
         reorganization, moratorium and other similar laws now or hereinafter in
         effect relating to or affecting creditors' rights generally, by general

                                       4


         equitable  principles  (regardless  of whether such  enforceability  is
         considered  in a proceeding  in equity or at law) or the  discretion of
         the court before which any  proceeding  therefor may be brought and, as
         to rights of indemnification and contribution,  by principles of public
         policy or U.S. or Canadian federal, state or provincial securities laws
         relating thereto.

                  (j) No consent, waiver, approval, authorization or order of or
         filing, registration,  qualification,  license or permit of or with any
         court or  governmental  agency or body,  or third party is required for
         (i) the  issuance  and sale by the  Issuers of the Notes to the Initial
         Purchaser  or the  consummation  by the  Issuers  of each of the  other
         transactions  contemplated  hereby  or by any of  the  other  Operative
         Documents and (ii) the issuance and sale by the  Subsidiary  Guarantors
         of the Guarantees or the  consummation by the Subsidiary  Guarantors of
         the other transactions  contemplated  hereby or by any of the Operative
         Documents,  except,  in each case,  such as have been or,  prior to the
         Closing  Date,  will be obtained,  such as may be required  under state
         securities  or "Blue  Sky" laws in  connection  with the  purchase  and
         resale of the  Securities  by the Initial  Purchaser and the receipt by
         the Issuers and the  Subsidiary  Guarantors  of an order  declaring the
         Exchange Offer  Registration  Statement  and/or the Shelf  Registration
         Statement effective from the Commission.  None of the Issuers or any of
         the  Subsidiaries  is (A) in  violation  of its  charter  or bylaws (or
         similar  organizational  document),  (B) in breach or  violation of any
         statute,  judgment, decree, order, rule or regulation applicable to any
         of them or any of their respective properties or assets, except for any
         such  breach or  violation  which  would  not,  individually  or in the
         aggregate,  have a  Material  Adverse  Effect,  or (C) in  breach of or
         default under (nor has any event occurred which, with notice or passage
         of time or both,  would  constitute a default under) or in violation of
         any of the terms or  provisions  of any  indenture,  mortgage,  deed of
         trust,  loan agreement,  note,  lease,  license,  permit,  certificate,
         contract or other  agreement  or  instrument  to which any of them is a
         party or to which any of them or their respective  properties or assets
         is subject  (collectively,  "Contracts"),  except for any such  breach,
         default,  violation  or event which would not,  individually  or in the
         aggregate, have a Material Adverse Effect.

                  (k) The execution,  delivery and performance by the Issuers of
         this Agreement and each of the other Operative Documents (to the extent
         a party thereto) and the consummation of the transactions  contemplated
         hereby and thereby  (including,  without  limitation,  the issuance and
         sale of the Securities to the Initial Purchaser and the issuance of the
         Exchange  Notes in the  Exchange  Offer),  do not and will not violate,
         conflict with or constitute or result in a breach of or a default under
         (or  constitute  an event  which with notice or passage of time or both
         would  constitute  a  default  under) or cause an  acceleration  of any
         obligation  under,  or result in the  imposition or creation of (or the
         obligation  to create or impose) a Lien (as defined) on any  properties

                                       5


         or assets of either  Issuer or any  Subsidiary  with respect to (A) the
         terms or  provisions  of any  Contract,  except for any such  conflict,
         breach, violation, default or event which would not, individually or in
         the  aggregate,  have a Material  Adverse  Effect,  (B) the  charter or
         bylaws (or similar  organizational  document)  of the Issuers or any of
         the Subsidiaries, or (C) (assuming compliance with all applicable state
         securities  or  "Blue  Sky"  laws  and  assuming  the  accuracy  of the
         representations  and  warranties of the Initial  Purchaser in Section 8
         hereof)  any  statute,  judgment,  decree,  order,  rule or  regulation
         applicable  to the Issuers or any of the  Subsidiaries  or any of their
         respective properties or assets,  except for any such conflict,  breach
         or violation which would not, individually or in the aggregate,  have a
         Material Adverse Effect.

                  (l) Ernst & Young LLP,  Deloitte & Touche LLP, KPMG  Chartered
         Accountants,  Arthur  Andersen  LLP and Price  Waterhouse  LLP, who are
         reporting on the audited financial  statements of the Issuers,  Enserch
         Exploration,  Inc.'s  Wamsutter Area package,  CGGS and Vessels Energy,
         Inc. ("Vessels"),  respectively,  included in the Final Memorandum, are
         independent  public  accountants  within the  meaning  of the Act.  The
         audited financial statements of the Issuers, CGGS, Enserch Exploration,
         Inc.'s  Wamsutter  Area package and Vessels and related  notes  thereto
         included  in the  Final  Memorandum  present  fairly  in  all  material
         respects  the  financial   position  of  the  Issuers,   CGGS,  Enserch
         Exploration, Inc.'s Wamsutter Area package and Vessels, as of the dates
         indicated  and the  results  of  their  respective  operations  and the
         changes in the cash flow for the periods specified,  in accordance with
         generally accepted accounting  principles ("GAAP") consistently applied
         throughout  such  periods,  except as  otherwise  stated  therein.  The
         summary and selected  financial  and  statistical  data included in the
         Final   Memorandum   present  fairly  in  all  material   respects  the
         information  shown  therein and have been  prepared  and  compiled on a
         basis  consistent  with  the  audited  financial   statements  included
         therein, except as stated therein.

                  (m) The pro forma  financial  statements  (including the notes
         thereto) and the other pro forma financial  information included in the
         Final  Memorandum  (i) comply as to form in all material  respects with
         the applicable  requirements  of Regulation S-X  promulgated  under the
         Securities  Exchange Act of 1934, as amended (the "Exchange Act"), (ii)
         have been  prepared in all  material  respects in  accordance  with the
         Commission's  rules and guidelines  with respect to pro forma financial
         statements,  and  (iii)  have  been  properly  computed  on  the  bases
         described  therein;  the assumptions used in the preparation of the pro
         forma financial data and other pro forma financial information included
         in the Final Memorandum are reasonable and the adjustments used therein
         are  appropriate to give effect to the  transactions  or  circumstances
         referred to therein.

                                       6


                  (n) There is not pending or, to the  knowledge of the Issuers,
         threatened any action,  suit,  proceeding,  inquiry or investigation to
         which either of the Issuers or any of the  Subsidiaries  is a party, or
         to which the  property or assets of either of the Issuers or any of the
         Subsidiaries is subject,  before or brought by any court, arbitrator or
         governmental agency or body which, if determined adversely to either of
         the Issuers or any of the Subsidiaries,  would,  individually or in the
         aggregate,  have a Material  Adverse Effect or which seeks to restrain,
         enjoin, prevent the consummation of or otherwise challenge the issuance
         or sale of the Securities to be sold hereunder or the  consummation  of
         the other transactions described in the Final Memorandum.

                  (o) Each of the Issuers  and the  Subsidiaries  possesses  all
         licenses, permits, certificates,  consents, orders, approvals and other
         authorizations  from, and has made all  declarations  and filings with,
         all  federal,  state,  local and other  governmental  authorities,  all
         self-regulatory  organizations  and all  courts  and  other  tribunals,
         presently  required or necessary  to own or lease,  as the case may be,
         and to operate its respective properties and to carry on its respective
         businesses as now or proposed to be conducted as set forth in the Final
         Memorandum ("Permits"), except where the failure to obtain such Permits
         would not, individually or in the aggregate,  reasonably be expected to
         have  a  Material   Adverse  Effect;   each  of  the  Issuers  and  the
         Subsidiaries  has fulfilled and performed all of its  obligations  with
         respect to such  Permits and no event has  occurred  which  allows,  or
         after notice or lapse of time would allow,  revocation  or  termination
         thereof or results in any other  material  impairment  of the rights of
         the holder of any such Permit, except where the failure to perform such
         obligations  or the  occurrence of such event would not have a Material
         Adverse Effect;  and none of the Issuers or any of the Subsidiaries has
         received  any  notice  of any  proceeding  relating  to  revocation  or
         modification  of any such  Permit,  except  as  described  in the Final
         Memorandum and except where such revocation or modification  would not,
         individually or in the aggregate, have a Material Adverse Effect.

                  (p)  Since the  respective  dates as to which  information  is
         given in the Final Memorandum, except as described therein, (i) none of
         the Issuers or any of the  Subsidiaries has incurred any liabilities or
         obligations,  direct or contingent,  or entered into or agreed to enter
         into  any  transactions  or  contracts  (written  or  oral)  not in the
         ordinary  course  of  business,  or  which  liabilities,   obligations,
         transactions or contracts would,  individually or in the aggregate,  be
         material to the business, condition (financial or otherwise), prospects
         or results of operations of the Issuers and the Subsidiaries,  taken as
         a  whole,  (ii)  none of the  Issuers  or any of the  Subsidiaries  has
         purchased any of its outstanding  capital stock, nor declared,  paid or
         otherwise made any dividend or  distribution of any kind on its capital

                                       7


         stock other than with respect to any of such  Subsidiary,  the purchase
         of, or dividend or distribution on, capital stock owned by the Company)
         and (iii) there shall not have been any change in the capital  stock or
         long-term indebtedness of any of the Issuers or Subsidiaries.

                  (q) Each of the  Issuers  and the  Subsidiaries  has filed all
         necessary federal,  state and foreign income and franchise tax returns,
         except  where  the  failure  to  so  file  such   returns   would  not,
         individually or in the aggregate,  have a Material Adverse Effect,  and
         has paid all taxes shown as due  thereon  except as to taxes any of the
         Issuers or Subsidiaries is contesting in good faith; and other than tax
         deficiencies  which any of the Issuers or Subsidiaries is contesting in
         good faith and for which such Issuer or such  Subsidiaries has provided
         adequate  reserves in accordance  with  generally  accepted  accounting
         principles,  there is no tax deficiency that has been asserted  against
         any of the Issuers or the Subsidiaries that would have, individually or
         in the aggregate, a Material Adverse Effect.

                  (r) The  statistical and  market-related  data included in the
         Final Memorandum are based on or derived from sources which the Issuers
         believe to be reliable and accurate.

                  (s)  None of the  Issuers  or any of the  Subsidiaries  or any
         agent  acting on their  behalf has taken or will take any  action  that
         might cause this  Agreement  or the sale of the  Securities  to violate
         Regulation  G,  T, U or X of the  Board  of  Governors  of the  Federal
         Reserve System, in each case as in effect, or as the same may hereafter
         be in effect, on the Closing Date.

                  (t)  Each of the  Issuers  and the  Subsidiaries  has good and
         defensible  title to all real  property  and good title to all personal
         property  described  in the Final  Memorandum  as being owned by it and
         good  and  defensible  title  to a  leasehold  estate  in the  real and
         personal property  described in the Final Memorandum as being leased by
         it free and clear of all liens, charges,  encumbrances or restrictions,
         except as described in the Final  Memorandum,  liens  arising under the
         Company's  senior  revolving  credit facility (the "Credit  Facility"),
         liens for taxes not yet  delinquent,  or to the extent  the  failure to
         have such title or the existence of such liens,  charges,  encumbrances
         or restrictions  would not,  individually  or in the aggregate,  have a
         Material Adverse Effect. All leases,  contracts and agreements to which
         any of the Issuers or  Subsidiaries  is a party or by which any of them
         is  bound  are  valid  and  enforceable  against  such  Issuer  or such
         Subsidiary, as the case may be, and to the knowledge of the Issuers and
         the Subsidiaries  are valid and enforceable  against the other party or
         parties  thereto  and are in full  force  and  effect  with  only  such
         exceptions  as would  not,  individually  or in the  aggregate,  have a

                                      8



         Material Adverse Effect,  except as such  enforceability may be limited
         by bankruptcy, insolvency, reorganization, moratorium and other similar
         laws now or hereinafter in effect  relating to or affecting  creditors'
         rights  generally,  by  general  equitable  principles  (regardless  of
         whether such  enforceability is considered in a proceeding in equity or
         at law) or the  discretion  of the court  before  which any  proceeding
         therefor  may be  brought.  The  Issuers  and the  Subsidiaries  own or
         possess  adequate   licenses  or  other  rights  to  use  all  patents,
         trademarks,   service  marks,  trade  names,  copyrights  and  know-how
         necessary to conduct the  businesses  now or proposed to be operated by
         them as described in the Final  Memorandum,  and none of the Issuers or
         any of the  Subsidiaries  has received any notice of infringement of or
         conflict with (or knows of any such  infringement  of or conflict with)
         asserted  rights of others  with  respect to any  patents,  trademarks,
         service  marks,  trade names,  copyrights  or know-how  which,  if such
         assertion of  infringement  or conflict  were  sustained,  would have a
         Material Adverse Effect.

                  (u) There are no legal or governmental  proceedings  involving
         or  affecting  any of  the  Issuers  or  Subsidiaries  or any of  their
         respective properties or assets which would be required to be described
         in a  prospectus  pursuant to the Act that are not so  described in the
         Final  Memorandum,  nor are  there  any  material  contracts  or  other
         documents  which  would be  required to be  described  in a  prospectus
         pursuant to the Act that are not so described in the Final Memorandum.

                  (v) Except as  described in the Final  Memorandum  or as would
         not, individually or in the aggregate, reasonably be expected to have a
         Material Adverse Effect (A) each of the Issuers and the Subsidiaries is
         in  compliance  with  and not  subject  to any  known  liability  under
         applicable  Environmental  Laws  (as  defined  below),  (B) each of the
         Issuers and the  Subsidiaries  has made all filings  and  provided  all
         notices required under any applicable  Environmental  Law, and has, and
         is in  compliance  with,  all  Permits  required  under any  applicable
         Environmental  Laws and each of them is in full force and  effect,  (C)
         there is no civil,  criminal or administrative  action,  suit,  demand,
         claim, hearing, notice of violation or, to the knowledge of the Issuers
         and the  Subsidiaries,  investigation,  proceeding,  notice  or  demand
         letter or request for information  pending or threatened against any of
         the Issuers or the  Subsidiaries  under any  Environmental  Law, (D) no
         lien,  charge,  encumbrance or restriction  has been recorded under any
         Environmental  Law with  respect to any  assets,  facility  or property
         owned,  operated,  leased or  controlled  by any of the  Issuers or the
         Subsidiaries,  (E) none of the Issuers or any of the  Subsidiaries  has
         received   notice  that  it  has  been   identified  as  a  potentially
         responsible  party  under  the  Comprehensive  Environmental  Response,
         Compensation and Liability Act of 1980, as amended  ("CERCLA"),  or any
         comparable state law, (F) no property or facility of any of the Issuers
         or the  Subsidiaries  is (i) listed or, to the knowledge of the Issuers

                                       9


         and the  Subsidiaries  proposed for listing on the National  Priorities
         List under CERCLA or is (ii) listed in the Comprehensive  Environmental
         Response,  Compensation,  Liability Information System List promulgated
         pursuant to CERCLA,  or on any comparable  list maintained by any state
         or local governmental authority.

                  For purposes of this Agreement, "Environmental Laws" means the
         common  law  and  all  applicable  federal,  state  and  local  laws or
         regulations,  codes, orders, decrees,  judgments or injunctions issued,
         promulgated,  approved or entered thereunder,  relating to pollution or
         protection of public or employee health and safety or the  environment,
         including,   without  limitation,   laws  relating  to  (i)  emissions,
         discharges, releases or threatened releases of hazardous materials into
         the environment  (including,  without limitation,  ambient air, surface
         water,  ground  water,  land surface or  subsurface  strata),  (ii) the
         manufacture,  processing,  distribution,  use,  generation,  treatment,
         storage,  disposal,  transport or handling of hazardous materials,  and
         (iii)  underground  and above ground storage tanks and related  piping,
         and emissions, discharges, releases or threatened releases therefrom.

                  (w)  There  is no  strike,  labor  dispute,  slowdown  or work
         stoppage with the  employees of any of the Issuers or the  Subsidiaries
         which is pending or, to the knowledge of the Issuers, threatened.

                  (x) Each of the Issuers and the Subsidiaries carries insurance
         including  self-insurance in such amounts and covering such risks as in
         its  reasonable  determination  is  adequate  for  the  conduct  of its
         business and the value of its properties.

                  (y)  None  of the  Issuers  or any  of  the  Subsidiaries  has
         incurred  any  liability  for any  prohibited  transaction  or  funding
         deficiency or any complete or partial withdrawal liability with respect
         to any  pension,  profit  sharing or other plan which is subject to the
         Employee  Retirement Income Security Act of 1974, as amended ("ERISA"),
         to which any of the Issuers or the Subsidiaries  makes or ever has made
         a  contribution  and in which any employee of any of the Issuers or the
         Subsidiaries is or has ever been a participant,  which in the aggregate
         could have a Material Adverse Effect.  With respect to such plans, each
         of the Issuers and the  Subsidiaries  is in  compliance in all respects
         with all applicable provisions of ERISA, except where the failure to so
         comply would not,  individually  or in the  aggregate,  have a Material
         Adverse Effect.

                  (z) Each of the  Issuers  and the  Subsidiaries  (i) makes and
         keeps accurate books and records and (ii) maintains internal accounting
         controls which provide  reasonable  assurance that (A) transactions are

                                       10


         executed   in   accordance   with   management's   authorization,   (B)
         transactions  are recorded as necessary  to permit  preparation  of its
         financial statements and to maintain accountability for its assets, (C)
         access to its assets is permitted only in accordance with  management's
         authorization  and (D) the  reported  accountability  for its assets is
         compared with existing assets at reasonable intervals.

                  (aa) None of the Issuers or any of the Subsidiaries will be an
         "investment  company" or "promoter" or "principal  underwriter"  for an
         "investment  company,"  as such  terms are  defined  in the  Investment
         Company  Act of  1940,  as  amended,  and  the  rules  and  regulations
         thereunder.

                  (bb)  The  Notes,   the   Guarantees,   the   Indenture,   the
         Registration  Rights  Agreement and the Credit Facility  conform in all
         material  respects to the descriptions  thereof  contained in the Final
         Memorandum.

                  (cc) No  holder of  securities  of any of the  Issuers  or any
         Subsidiary  will be entitled to have such securities  registered  under
         the  registration  statements  required  to be  filed  by  the  Issuers
         pursuant to the Registration Rights Agreement,  other than as expressly
         permitted thereby.

                  (dd)  Immediately  after the  consummation of the transactions
         contemplated  by this Agreement and the  Indenture,  the fair value and
         present  fair  saleable  value of the assets of each of the Issuers and
         the  Subsidiaries  will  exceed the sum of its stated  liabilities  and
         identified  contingent  liabilities;  none of the Issuers or any of the
         Subsidiaries  (each on a  consolidated  basis)  is, nor will any of the
         Issuers or the  Subsidiaries  (each on a consolidated  basis) be, after
         giving  effect  to the  execution,  delivery  and  performance  of this
         Agreement and the Indenture,  and the  consummation of the transactions
         contemplated  hereby  and  thereby,  (a) left with  unreasonably  small
         capital  with which to carry on its  business  as it is  proposed to be
         conducted,  (b) unable to pay its debts  (contingent  or  otherwise) as
         they mature or (c) otherwise insolvent.

                  (ee) None of the Issuers or any of the  Subsidiaries or any of
         their respective  Affiliates (as defined in Rule 501(b) of Regulation D
         under the Act) has directly,  or through any agent,  (i) sold,  offered
         for sale,  solicited  offers to buy or otherwise  negotiated in respect
         of,  any  "security"  (as  defined  in the  Act)  which  is or could be
         integrated  with the sale of the  Securities  in a  manner  that  would
         require  the  registration  under  the  Act of the  Securities  or (ii)
         engaged in any form of general  solicitation or general advertising (as
         those terms are used in Regulation D under the Act) in connection  with
         the  offering  of the  Securities  or in any manner  involving a public
         offering within the meaning of Section 4(2) of the Act.

                                       11


                  (ff)  When  the  Securities  are  delivered  pursuant  to this
         Agreement, none of the Securities will be of the same class (within the
         meaning of Rule 144A under the Act) as  securities  of either Issuer or
         any  Subsidiary  that are  listed  on a  national  securities  exchange
         registered  under Section 6 of the Exchange Act or that are quoted in a
         United States automated inter-dealer quotation system.

                  (gg)  None of the  Issuers,  the  Subsidiaries,  any of  their
         respective  Affiliates (as defined in Rule 501(b) of Regulation D under
         the Act) or any person  acting on any of their  behalf  (other than the
         Initial Purchaser) has engaged in any directed selling efforts (as that
         term is defined in  Regulation S under the Act  ("Regulation  S")) with
         respect to the Securities;  the Issuers and their respective Affiliates
         and any person  acting on any of their  behalf  (other than the Initial
         Purchaser) have complied with the offering restrictions  requirement of
         Regulation S.

                  (hh)   Subsequent  to  the   respective   dates  as  of  which
         information  is given in the  Final  Memorandum  and up to the  Closing
         Date,  except  as set  forth in the Final  Memorandum,  neither  of the
         Issuers  has  incurred  any  liabilities  or  obligations,   direct  or
         contingent,  which are  material to the Issuers  taken as a whole,  nor
         entered into any transaction not in the ordinary course of business and
         there has not been,  individually  or in the  aggregate,  any  material
         adverse change,  or any development which may reasonably be expected to
         involve a material adverse change, in the properties, business, results
         of operations, condition (financial or otherwise), affairs or prospects
         of the Issuers taken as a whole  (including,  without  limitation,  any
         material downward  revision in the Issuers'  estimated proved reserves)
         other than any such effect  caused  solely by  decreases  in crude oil,
         natural gas liquids and natural gas prices (any such event, a "Material
         Adverse Change").

                  (ii) Assuming that the  representations  and warranties of the
         Initial  Purchaser  contained in Section 8 are true and correct,  it is
         not  necessary in connection  with the offer,  sale and delivery of the
         Securities  to the Initial  Purchaser  or the reoffer and resale by the
         Initial  Purchaser  in the manner  contemplated  by this  Agreement  to
         register the  Securities  under the Act or to qualify the  Indenture in
         respect of the Notes under the TIA.

         (jj) Western is a subsidiary of the Company with no operations,  assets
         or liabilities  other than  $2,000,000 par value preferred stock issued
         to a bank. Any  certificate  signed by any officer of either Issuer and
         delivered  to any  Initial  Purchaser  or to  counsel  for the  Initial
         Purchaser or either of the Issuers  shall be deemed a joint and several
         representation  and warranty by the Issuers to the Initial Purchaser as
         to the matters covered thereby.

                                       12


         3. Purchase,  Sale and Delivery of the Securities.  On the basis of the
representations,  warranties,  agreements  and  covenants  herein  contained and
subject to the terms and conditions herein set forth, the Issuers agree to issue
and sell to the Initial Purchaser,  and the Initial Purchaser agrees to purchase
the Notes (and the related Guarantees) at 104.75% of their principal amount. One
or more  certificates  in definitive  form for the Notes and Guarantees that the
Initial Purchaser have agreed to purchase hereunder, and in such denomination or
denominations  and  registered  in such name or names as the  Initial  Purchaser
request upon notice to the Issuers at least 36 hours prior to the Closing  Date,
shall be  delivered  by or on behalf of the  Issuers to the  Initial  Purchaser,
against  payment by or on behalf of the Initial  Purchaser of the purchase price
therefor by wire  transfer  (same day funds) to such  account or accounts as the
Issuers shall specify prior to the Closing Date, or by such means as the parties
hereto shall agree prior to the Closing  Date.  Such delivery of and payment for
the  Securities  shall be made at the  offices of Vinson & Elkins  L.L.P.,  1001
Fannin,  Suite 3600,  Houston,  Texas at 9:00 a.m.,  central  standard  time, on
January 27, 1998, or at such other place, time or date as the Initial Purchaser,
on the one hand, and the Issuers,  on the other hand, may agree upon,  such time
and date of delivery  against  payment being herein  referred to as the "Closing
Date." The Issuers will make such certificate or certificates for the Securities
available for checking and packaging by the Initial  Purchaser at the offices of
Jefferies & Company, Inc., Houston, Texas, or at such other place as Jefferies &
Company, Inc. may designate, at least 24 hours prior to the Closing Date.

         4. Offering by the Initial Purchaser. The Initial Purchaser proposes to
make an offering of the  Securities at the price and upon the terms set forth in
the Final  Memorandum,  as soon as  practicable  after this Agreement is entered
into and as in the judgment of the Initial Purchaser is advisable.

         5.  Covenants  of the  Issuers.  The  Issuers,  jointly and  severally,
covenant and agree with the Initial Purchaser that:

                  (a) The  Issuers  will  not  amend  or  supplement  the  Final
         Memorandum or any amendment or supplement  thereto of which the Initial
         Purchaser  shall not previously  have been advised and furnished a copy
         for a  reasonable  period of time prior to the  proposed  amendment  or
         supplement and as to which the Initial  Purchaser  shall not have given
         its consent,  which consent  shall not  unreasonably  be withheld.  The
         Issuers  will  promptly,  upon the  reasonable  request of the  Initial
         Purchaser or counsel for the Initial Purchaser,  make any amendments or
         supplements to the Final  Memorandum that may be necessary or advisable
         in  connection  with  the  resale  of the  Securities  by  the  Initial
         Purchaser.

                                       13


                  (b) The Issuers will cooperate  with the Initial  Purchaser in
         arranging for the qualification of the Securities for offering and sale
         under the  securities or "Blue Sky" laws of such  jurisdictions  as the
         Initial  Purchaser may designate and will continue such  qualifications
         in effect for as long as may be necessary to complete the resale of the
         Securities; provided, however, that in connection therewith, neither of
         the Issuers shall be required to qualify as a foreign corporation or to
         execute a general consent to service of process in any  jurisdiction or
         subject  itself to taxation in excess of a nominal dollar amount in any
         such jurisdiction where it is not then so subject.

                  (c) If, at any time prior to the initial resale by the Initial
         Purchaser of the Securities or the Exchange Notes,  any event occurs or
         information  becomes known as a result of which the Final Memorandum as
         then amended or  supplemented  would include any untrue  statement of a
         material  fact, or omit to state a material fact  necessary to make the
         statements  therein, in the light of the circumstances under which they
         were made, not  misleading,  or if for any other reason it is necessary
         at any time to amend or supplement the Final  Memorandum to comply with
         applicable law, the Issuers will promptly notify the Initial  Purchaser
         thereof and will prepare,  at the expense of the Issuers,  an amendment
         or supplement to the Final  Memorandum  that corrects such statement or
         omission or effects such compliance.

                  (d) The Issuers will,  without charge,  provide to the Initial
         Purchaser  and to counsel for the Initial  Purchaser  as many copies of
         the Final  Memorandum  or any  amendment or  supplement  thereto as the
         Initial Purchaser may reasonably request.

                  (e) The Issuers will apply the net  proceeds  from the sale of
         the  Securities  as set  forth  under  "Use of  Proceeds"  in the Final
         Memorandum.

                  (f) For so long as any of the Securities  remain  outstanding,
         the Issuers will furnish to the Initial Purchaser copies of all reports
         and other  communications  (financial  or  otherwise)  furnished by the
         Issuers to the  Trustee or to the  holders of the Notes and, as soon as
         available,  copies of any reports or financial  statements furnished to
         or filed by the Issuers with the Commission or any national  securities
         exchange on which any class of securities of the Company may be listed.

                  (g) Prior to the Closing Date, the Company will furnish to the
         Initial  Purchaser,  as soon as they have been  prepared,  if at all, a
         copy  of  any  available  unaudited   consolidated   interim  financial
         statements  of  the  Company  and  any  available   unaudited   interim
         consolidated  financial  statements  of CGGS and Vessels for any period
         subsequent  to  the  period  covered  by  the  most  recent   financial

                                       14


         statements of the Company, CGGS and Vessels respectively,  appearing in
         the Final Memorandum.

                  (h) None of the Issuers or any of their  Affiliates will sell,
         offer for sale or  solicit  offers  to buy or  otherwise  negotiate  in
         respect  of any  "security"  (as  defined  in the Act)  which  could be
         integrated  with the sale of the  Securities  in a manner  which  would
         require the registration under the Act of the Securities.

                  (i) The  Issuers  will  not,  and will not  permit  any of the
         Subsidiaries to, engage in any form of general  solicitation or general
         advertising  (as those terms are used in Regulation D under the Act) in
         connection  with  the  offering  of the  Securities  or in  any  manner
         involving a public  offering  within the meaning of Section 4(2) of the
         Act.

                  (j) For so long as any of the Securities  remain  outstanding,
         the Company will make  available at its expense,  upon request,  to any
         holder of such Securities and any prospective  purchaser  thereof,  the
         information  specified  in Rule  144A(d)(4)  under the Act,  unless the
         Company is then subject to Section 13 or 15(d) of the Exchange Act.

                  (k) The Issuers  will use their best efforts to (i) permit the
         Securities  to be  designated  for  trading in the  Private  Offerings,
         Resales and Trading  through  Automated  Linkages  market (the  "PORTAL
         Market") of the NASD and (ii) permit the  Securities to be eligible for
         clearance and settlement through The Depository Trust Company.

                  (l) In  connection  with  Securities  offered  and  sold in an
         off-shore transaction (as defined in Regulation S) the Issuers will not
         register  any  transfer of such Notes not made in  accordance  with the
         provisions of Regulation S and will not,  except in accordance with the
         provisions of Regulation S, if applicable,  issue any such Notes in the
         form of definitive securities.

         6. Expenses. The Issuers agree, jointly and severally, to pay all costs
and expenses  incident to the performance of their respective  obligations under
this  Agreement,  whether  or  not  the  transactions  contemplated  herein  are
consummated  or this  Agreement  is  terminated  pursuant  to Section 10 hereof,
including all costs and expenses  incident to (i) the printing,  word processing
or other production of documents with respect to the  transactions  contemplated
hereby, including any costs of printing the Preliminary Memorandum and the Final
Memorandum  and  any  amendment  or  supplement  thereto,  and  any  "Blue  Sky"
memoranda,  (ii)  all  arrangements  relating  to the  delivery  to the  Initial
Purchaser of copies of the foregoing documents, (iii) the fees and disbursements
of the counsel,  the accountants  and any other experts or advisors  retained by
the Issuers, (iv) preparation (including printing), issuance and delivery to the

                                       15


Initial  Purchaser of the Securities,  (v) the  qualification  of the Securities
under state securities and "Blue Sky" laws, including filing fees and reasonable
fees and  disbursements of counsel for the Initial  Purchaser  relating thereto,
(vi) expenses in connection with any meetings with prospective  investors in the
Securities, (vii) fees and expenses of the Trustee including reasonable fees and
expenses  of its  counsel,  (viii) all  expenses  and listing  fees  incurred in
connection  with the  application  for quotation of the Securities on the PORTAL
Market,  (ix) any fees charged by investment  rating  agencies for the rating of
the  Securities  and (x) all  reasonable  out-of-pocket  expenses of the Initial
Purchaser.  If the sale of the Securities provided for herein is not consummated
because any condition to the  obligations of the Initial  Purchaser set forth in
Section 7 hereof is not  satisfied,  because  this  Agreement is  terminated  or
because of any  failure,  refusal  or  inability  on the part of the  Issuers to
perform all obligations and satisfy all conditions on their part to be performed
or satisfied  hereunder (other than solely by reason of a default by the Initial
Purchaser of their  obligations  hereunder  after all conditions  hereunder have
been  satisfied  in  accordance  herewith),   the  Issuers  agree,  jointly  and
severally,  to  promptly  reimburse  the Initial  Purchaser  upon demand for all
out-of-pocket expenses that shall have been incurred by the Initial Purchaser in
connection with the proposed purchase and sale of the Securities.

         7. Conditions of the Initial Purchaser's Obligations. The obligation of
the Initial  Purchaser to purchase and pay for the Securities shall, in its sole
discretion, be subject to the satisfaction or waiver of the following conditions
on or prior to the Closing Date:

                  (a) On the  Closing  Date,  the Initial  Purchaser  shall have
         received the opinion, dated as of the Closing Date and addressed to the
         Initial Purchaser,  of Cox & Smith Incorporated,  United States counsel
         for the Issuers, in form and substance  satisfactory to counsel for the
         Initial Purchaser, to the effect that:

                           (i)  The  Company  is  duly   incorporated,   validly
                  existing  and  in  good   standing   under  the  laws  of  its
                  jurisdiction of incorporation and has all requisite  corporate
                  power and authority to own its  properties  and to conduct its
                  business as described in the Final Memorandum.  The Company is
                  duly qualified to do business as a foreign corporation in good
                  standing in each  jurisdiction  where the ownership or leasing
                  of its properties or the conduct of its business requires such
                  qualification,  except  where the  failure to be so  qualified
                  would not,  individually or in the aggregate,  have a Material
                  Adverse Effect.

                           (ii) All of the  outstanding  shares of capital stock
                  of the  Issuers  and each of the  Subsidiaries  have been duly
                  authorized   and   validly   issued,   are   fully   paid  and
                  nonassessable  and,  with  respect to the Company and Western,
                  were not  issued in  violation  of any  preemptive  or similar

                                       16


                  rights;  all of the  outstanding  shares of  capital  stock of
                  Canadian Abraxas will be owned, directly or indirectly, by the
                  Company,  free and clear of all perfected  security  interests
                  other than those arising under the Credit Facility and, to the
                  knowledge of such counsel,  free and clear of all other liens,
                  encumbrances,   equities   and  claims  or   restrictions   on
                  transferability  (other than those  imposed by the Act and the
                  securities  or "Blue  Sky" laws of certain  jurisdictions  and
                  those arising under the Credit Facility) or voting.

                           (iii) To the knowledge of such counsel, except as set
                  forth in the Final  Memorandum,  no holder  of  securities  of
                  either Issuer or any of the  Subsidiaries  is entitled to have
                  such  securities  registered  under a  registration  statement
                  filed pursuant to the Registration Rights Agreement.

                           (iv) The Company has the  requisite  corporate  power
                  and authority to execute,  deliver and perform its obligations
                  under this Agreement and each of the other Operative Documents
                  and to consummate  the  transactions  contemplated  hereby and
                  thereby,  including,  without limitation,  the corporate power
                  and  authority to issue,  sell and deliver the  Securities  as
                  contemplated by this Agreement.  The Company has the requisite
                  corporate power and authority to execute,  deliver and perform
                  its   obligations   under  each  Operative   Document  and  to
                  consummate the transactions contemplated hereby and thereby.

                           (v)  This   Agreement   has  been  duly  and  validly
                  authorized,  executed  and  delivered  by the  Company and the
                  Company has the  requisite  corporate  power and  authority to
                  execute,  deliver  and  perform  its  obligations  under  this
                  Agreement  and to  consummate  the  transactions  contemplated
                  hereby.

                           (vi)  The   Indenture   has  been  duly  and  validly
                  authorized   by  the  Company  and,  when  duly  executed  and
                  delivered  in  accordance  with its  terms  (assuming  the due
                  execution and delivery  thereof by each of the parties thereto
                  other than the Company), will be the valid and legally binding
                  agreement of the Company,  enforceable  against the Company in
                  accordance with its terms,  except as such  enforceability may
                  be  limited   by   bankruptcy,   insolvency,   reorganization,
                  moratorium and other similar laws now or hereinafter in effect
                  relating  to or  affecting  creditors'  rights  generally,  by
                  general  equitable  principles  (regardless  of  whether  such
                  enforceability  is  considered in a proceeding in equity or at
                  law)  or  the   discretion  of  the  court  before  which  any
                  proceeding  therefor may be brought;  and the Indenture  meets
                  the requirements for qualification under the TIA.

                                       17



                           (vii) The Notes have been duly and validly authorized
                  for issuance and sale to the Initial  Purchaser by the Company
                  pursuant to this Agreement and, when issued and  authenticated
                  in  accordance  with the terms of the  Indenture and delivered
                  against payment  therefor in accordance with the terms hereof,
                  will be the  legally  valid  and  binding  obligations  of the
                  Company,  enforceable  against the Company in accordance  with
                  their  terms and  entitled to the  benefits of the  Indenture,
                  except as such  enforceability  may be limited by  bankruptcy,
                  insolvency, reorganization,  moratorium and other similar laws
                  now  or  hereinafter  in  effect   relating  to  or  affecting
                  creditors' rights generally,  by general equitable  principles
                  (regardless of whether such  enforceability is considered in a
                  proceeding in equity or at law) or the discretion of the court
                  before which any proceeding therefor may be brought.

                           (viii) The Exchange  Notes have been duly and validly
                  authorized  for issuance by the Company  and,  when issued and
                  authenticated  in accordance  with the terms of the Indenture,
                  the Registration Rights Agreement and the Exchange Offer, will
                  be the legally valid and binding  obligations  of the Company,
                  enforceable against the Company in accordance with their terms
                  and entitled to the benefits of the Indenture,  except as such
                  enforceability  may  be  limited  by  bankruptcy,  insolvency,
                  reorganization,  moratorium  and  other  similar  laws  now or
                  hereinafter  in effect  relating  to or  affecting  creditors'
                  rights generally,  by general equitable principles (regardless
                  of whether such  enforceability  is considered in a proceeding
                  in equity  or at law) or the  discretion  of the court  before
                  which any proceeding therefor may be brought.

                           (ix) The Registration  Rights Agreement has been duly
                  authorized   by  the  Company  and,  when  duly  executed  and
                  delivered  by the  Company  (assuming  the due  execution  and
                  delivery thereof by each of the parties thereto other than the
                  Company),  will be the legally valid and binding obligation of
                  the  Company,  enforceable  against the Company in  accordance
                  with its terms,  except as such  enforceability may be limited
                  by  bankruptcy,  insolvency,  reorganization,  moratorium  and
                  other similar laws now or hereinafter in effect relating to or
                  affecting  creditors' rights  generally,  by general equitable
                  principles  (regardless  of  whether  such  enforceability  is
                  considered  in a  proceeding  in  equity  or at  law)  or  the
                  discretion of the court before which any  proceeding  therefor
                  may be  brought  and,  as to  rights  of  indemnification  and
                  contribution,  by  principles  of public  policy or federal or
                  state securities or "Blue Sky" laws relating thereto.

                                       18


                           (x) The statements set forth in the Final  Memorandum
                  under the captions  "Business-Regulatory Matters" and "Certain
                  United States and Canadian Income Tax Considerations"  insofar
                  as they address matters of United States or Texas law or legal
                  conclusions based on United States or Texas law and subject to
                  the limitations set forth therein,  insofar as such statements
                  constitute  a summary  of the  matters  referred  to  therein,
                  fairly  and  accurately  present  the  information   disclosed
                  therein in all material respects.

                           (xi) The Indenture,  the Notes,  the Guarantees,  the
                  Registration  Rights Agreement and the Credit Facility conform
                  in all material respects to the descriptions thereof contained
                  in the Final Memorandum.

                           (xii)  To  such  counsel's  knowledge,  no  legal  or
                  governmental  proceedings  are pending or  threatened to which
                  either of the Issuers or any Subsidiary is a party or to which
                  the  property  or  assets  of  either  of the  Issuers  or any
                  Subsidiary  is  subject,  before  or  brought  by  any  court,
                  arbitrator or government  agency or body which,  if determined
                  adversely  to either of the Issuers or any  Subsidiary,  would
                  result,  individually  or  in  the  aggregate,  in a  Material
                  Adverse Effect,  or which seeks to restrain,  enjoin,  prevent
                  the  consummation  of or otherwise  challenge  the issuance or
                  sale  of  the   Securities   to  be  sold   hereunder  or  the
                  consummation of the other transactions  described in the Final
                  Memorandum.

                           (xiii)  To  such  counsel's  knowledge,  none  of the
                  Issuers or any of the  Subsidiaries is (A) in violation of its
                  charter or bylaws (or similar organizational document), (B) in
                  breach or violation of any statute,  judgment,  decree, order,
                  rule or  regulation  applicable to any of them or any of their
                  respective properties or assets, except for any such breach or
                  violation  which would not,  individually or in the aggregate,
                  have a Material Adverse Effect, or (C) in breach of or default
                  under  (nor has any  event  occurred  which,  with  notice  or
                  passage of time or both,  would constitute a default under) or
                  in  violation  of  any  of  the  terms  or  provisions  of any
                  Contract,  except for any such breach,  default,  violation or
                  event which would not, individually or in the aggregate,  have
                  a Material Adverse Effect.

                           (xiv) The execution,  delivery and performance by the
                  Issuers  of the  Purchase  Agreement  and  each  of the  other
                  Operative  Documents  (to the extent a party  thereto) and the
                  consummation  of  the  transactions  contemplated  hereby  and
                  thereby (including,  without limitation, the issuance and sale

                                       19


                  of the Securities to the Initial Purchaser and the issuance of
                  the  Exchange  Notes in the Exchange  Offer),  do not conflict
                  with or  constitute  or result in a breach or a default  under
                  (or an event  which  with  notice or  passage  of time or both
                  would  constitute a default under) or violation of or cause an
                  acceleration  of  any  obligation  under,  or  result  in  the
                  imposition  or  creation  of (or the  obligation  to create or
                  impose) a Lien on any  properties  or assets of the Company or
                  any Subsidiary  with respect to (i) the terms or provisions of
                  any  Contract  known to such counsel to which the Company is a
                  party,  except  for  any  such  conflict,  breach,  violation,
                  default  or event  which  would  not,  individually  or in the
                  aggregate,   have  a  Material   Adverse   Effect,   (ii)  the
                  certificate   of   incorporation   or   bylaws   (or   similar
                  organizational  document) of the Company,  or (iii)  (assuming
                  compliance with all applicable  state securities or "Blue Sky"
                  laws and  assuming  the  accuracy of the  representations  and
                  warranties  of the Initial  Purchaser in Section 8 hereof) any
                  statute,  judgment, decree, order, rule or regulation known to
                  such  counsel to be  applicable  to the  Company or any of its
                  properties or assets, except for any such conflict,  breach or
                  violation  which would not,  individually or in the aggregate,
                  have a Material Adverse Effect.

                           (xv) To the  knowledge of such  counsel,  no consent,
                  waiver,  approval,   authorization  or  order  of  or  filing,
                  registration,  qualification, license or permit of or with any
                  court  or  governmental  agency  or body,  or  third  party is
                  required for the issuance and sale by the Issuers of the Notes
                  to the Initial Purchaser or the consummation by the Issuers of
                  the other transactions contemplated hereby, except such as may
                  be required under Blue Sky laws, as to which such counsel need
                  express no opinion,  those which have previously been obtained
                  and the receipt by the Issuers and the  Subsidiary  Guarantors
                  of  an  order   declaring  the  Exchange  Offer   Registration
                  Statement and/or the Shelf  Registration  Statement  effective
                  from the Commission.

                           (xvi) To the knowledge of such counsel,  there are no
                  legal  or  governmental  proceedings  involving  or  affecting
                  either Issuer or the  Subsidiaries or any of their  respective
                  properties  or assets  which would be required to be described
                  in a prospectus  pursuant to the Act that are not so described
                  in the Final Memorandum,  nor are there any material contracts
                  or other  documents which would be required to be described in
                  a prospectus  pursuant to the Act that are not so described in
                  the Final Memorandum.

                           (xvii) None of the Issuers or any of the Subsidiaries
                  is, or immediately after the sale of the Securities to be sold
                  hereunder and the  application  of the proceeds from such sale
                  (as described in the Final  Memorandum  under the caption "Use

                                       20


                  of Proceeds") will be, an "investment company" as such term is
                  defined in the Investment Company Act of 1940, as amended.

                           (xviii)  No   registration   under  the  Act  of  the
                  Securities  is  required  in  connection  with the sale of the
                  Securities to the Initial  Purchaser as  contemplated  by this
                  Agreement and the Final  Memorandum or in connection  with the
                  initial resale of the  Securities by the Initial  Purchaser in
                  accordance with Section 8 of this Agreement,  and prior to the
                  commencement of the Exchange Offer or the effectiveness of the
                  Shelf Registration Statement, the Indenture is not required to
                  be qualified under the TIA, in each case assuming (i) that the
                  purchasers  who buy  such  Securities  in the  initial  resale
                  thereof are qualified  institutional buyers as defined in Rule
                  144A   promulgated   under  the  Act  ("QIBs")  or  accredited
                  investors  as  defined in Rule  501(a)  (1),  (2),  (3) or (7)
                  promulgated under the Act ("Accredited  Investors"),  (ii) the
                  accuracy of the Initial Purchaser's representations in Section
                  8 and  those  of  the  Issuers  contained  in  this  Agreement
                  regarding the absence of a general  solicitation in connection
                  with the sale of such Securities to the Initial  Purchaser and
                  the initial  resale  thereof and (iii) the due  performance by
                  the Initial Purchaser of the agreements set forth in Section 8
                  hereof.

                           (xix) Neither the  consummation  of the  transactions
                  contemplated  by  this  Agreement  nor  the  sale,   issuance,
                  execution   or  delivery  of  the   Securities   will  violate
                  Regulation  G,  T, U or X of the  Board  of  Governors  of the
                  Federal Reserve System.

                  At the time the foregoing  opinion is delivered,  Cox & Smith,
         Incorporated  shall  additionally  state  that it has  participated  in
         conferences  with  officers and other  representatives  of the Issuers,
         representatives  of the independent public accountants for the Issuers,
         representatives of Canadian counsel for the Issuers, representatives of
         the Initial Purchaser and counsel for the Initial  Purchaser,  at which
         conferences  the contents of the Final  Memorandum and related  matters
         were discussed,  and, although it has not independently verified and is
         not  passing  upon and  assumes  no  responsibility  for the  accuracy,
         completeness  or  fairness  of the  statements  contained  in the Final
         Memorandum  (except to the extent specified in subsections (x) and (xi)
         of this Section 7(a)),  no facts have come to its attention  which lead
         it to believe that the Final Memorandum,  on the date thereof or at the
         Closing  Date,  contained  an untrue  statement  of a material  fact or
         omitted  to state a  material  fact  required  to be stated  therein or
         necessary to make the  statements  contained  therein,  in light of the
         circumstances  under  which they were made,  not  misleading  (it being
         understood  that such firm need  express no opinion with respect to the

                                       21


         financial statements and related notes thereto and the other financial,
         engineering,  statistical  and  accounting  data  included in the Final
         Memorandum).

                  In rendering the foregoing opinions,  Cox & Smith Incorporated
         may (i)  rely,  to the  extent  such  counsel  deems  proper,  upon the
         representations  and  certifications  of  officers of the Issuers or of
         public officials and (ii) rely as to matters  involving the application
         of laws of any  jurisdiction  other than the federal laws of the United
         States  of  America  and  the  laws  of the  State  of  Texas  and  the
         corporation  law of the State of  Nevada,  to the extent  such  counsel
         deems proper and specifies in such  opinion,  upon the opinion of other
         counsel  who are  reasonably  satisfactory  to counsel  for the Initial
         Purchaser; provided, however, that Cox & Smith Incorporated shall state
         that it  believes  that it, the Initial  Purchaser  and counsel for the
         Initial Purchaser are justified in relying on such opinion.

                  References  to the Final  Memorandum  in this  subsection  (a)
         shall  include  any  amendment  or  supplement   thereto   prepared  in
         accordance with the provisions of this Agreement at the Closing Date.

                  (b) On the  Closing  Date,  the Initial  Purchaser  shall have
         received the opinion, dated as of the Closing Date and addressed to the
         Initial Purchaser,  of Osler,  Hoskin & Harcourt,  Canadian Counsel for
         the  Issuers,  in form and  substance  satisfactory  to counsel for the
         Initial Purchaser, to the effect that:

                           (i) Each of  Canadian  Abraxas  and  Cascade  is duly
                  incorporated,  validly existing and in good standing under the
                  laws of its respective  jurisdiction of incorporation  and has
                  all  requisite  corporate  power  and  authority  to  own  its
                  properties  and to conduct its  business as  described  in the
                  Final Memorandum. Each of Canadian Abraxas and Cascade is duly
                  qualified  to carry on  business  in the  Province of Alberta,
                  Canada,  being the only jurisdiction in which such entities do
                  business.
                           (ii) All of the  outstanding  shares of capital stock
                  of Canadian  Abraxas  and  Cascade  have been duly and validly
                  issued,  are fully paid and  non-assessable  and in respect of
                  Canadian Abraxas, to the knowledge of counsel, were not issued
                  in violation of any preemptive or similar rights.  The Company
                  is the registered  owner of all of the  outstanding  shares of
                  capital  stock of  Canadian  Abraxas  and the  Company  is the
                  registered  owner  of  the  capital  stock  of  Cascade  as is
                  reflected in the Final Memorandum in the indirect ownership of
                  the Company in Cascade;  in each such case,  free and clear of
                  all perfected security interests registered in the Province of
                  Alberta  against the Company and Cascade.  To the knowledge of
                  such counsel,  except as set forth in the Final Memorandum (A)
                  no options, warrants or other rights to purchase from Canadian

                                       22


                  Abraxas  or  Cascade  shares  of  capital  stock or  ownership
                  interests  in  Canadian  Abraxas or Cascade  are  outstanding,
                  other than as are disclosed in the Final  Memorandum and other
                  than  stock  options   issued  to   employees,   officers  and
                  directors, (B) no agreements or other obligations to issue, or
                  other rights to convert,  any obligation into, or exchange any
                  securities for, shares of capital stock or ownership interests
                  in  Canadian  Abraxas or Cascade  are  outstanding  other than
                  stock options issued to employees,  officers and directors and
                  (C) no holder of securities of Canadian  Abraxas or Cascade is
                  entitled   to  have  such   securities   registered   under  a
                  registration  statement  filed  pursuant  to the  Registration
                  Rights Agreement.

                           (iii) Each of  Canadian  Abraxas  and Cascade has all
                  requisite  corporate  power and authority to execute,  deliver
                  and perform its  respective  obligations  under this Agreement
                  and the other  Operative  Documents to which it is a party and
                  to  consummate  the  transactions   contemplated   hereby  and
                  thereby, including, without limitation, in respect of Canadian
                  Abraxas the corporate  power and authority to issue,  sell and
                  deliver the Securities as contemplated by this Agreement.

                           (iv)  This   Agreement  has  been  duly  and  validly
                  authorized, executed and delivered by Canadian Abraxas.

                           (v)  The   Indenture   has  been  duly  and   validly
                  authorized  by Canadian  Abraxas and,  when duly  executed and
                  delivered  in  accordance  with its  terms  (assuming  the due
                  execution and delivery thereof by the other parties  thereto),
                  will be the valid and legally  binding  agreement  of Canadian
                  Abraxas,  enforceable against it in accordance with its terms,
                  except as such  enforceability  may be limited by  bankruptcy,
                  insolvency, reorganization,  moratorium and other similar laws
                  now  or  hereinafter  in  effect   relating  to  or  affecting
                  creditors' rights generally,  by general equitable  principles
                  (regardless of whether such  enforceability is considered in a
                  proceeding in equity or at law).

                           (vi) The Notes have been duly and validly  authorized
                  for  issuance  and sale to the Initial  Purchaser  by Canadian
                  Abraxas  pursuant  to this  Agreement  and,  when  issued  and
                  authenticated  in  accordance  with the terms of the Indenture
                  and delivered  against payment therefor in accordance with the
                  terms   hereof,   will  be  the  legally   valid  and  binding
                  obligations of Canadian Abraxas,  enforceable against Canadian
                  Abraxas in  accordance  with their  terms and  entitled to the
                  benefits of the Indenture,  except as such  enforceability may
                  be  limited   by   bankruptcy,   insolvency,   reorganization,
                  moratorium and other similar laws now or hereinafter in effect

                                       23


                  relating  to or  affecting  creditors'  rights  generally,  by
                  general  equitable  principles  (regardless  of  whether  such
                  enforceability  is  considered in a proceeding in equity or at
                  law).

                           (vii) The  Exchange  Notes have been duly and validly
                  authorized  for issuance by Canadian  Abraxas and, when issued
                  and   authenticated  in  accordance  with  the  terms  of  the
                  Indenture,  the Registration Rights Agreement and the Exchange
                  Offer,  will be the legally valid and binding  obligations  of
                  Canadian  Abraxas,  enforceable  against  Canadian  Abraxas in
                  accordance  with their terms and  entitled to the  benefits of
                  the Indenture, except as such enforceability may be limited by
                  bankruptcy, insolvency,  reorganization,  moratorium and other
                  similar  laws now or  hereinafter  in  effect  relating  to or
                  affecting  creditors' rights  generally,  by general equitable
                  principles  (regardless  of  whether  such  enforceability  is
                  considered in a proceeding in equity or at law).

                           (viii) The  Registration  Rights  Agreement  has been
                  duly  authorized  by Canadian  Abraxas and, when duly executed
                  and delivered by Canadian Abraxas  (assuming the due execution
                  and delivery  thereof by the other parties  thereto),  will be
                  the legally valid and binding  obligation of Canadian Abraxas,
                  enforceable against it in accordance with its terms, except as
                  such enforceability may be limited by bankruptcy,  insolvency,
                  reorganization,  moratorium  and  other  similar  laws  now or
                  hereinafter  in effect  relating  to or  affecting  creditors'
                  rights generally,  by general equitable principles (regardless
                  of whether such  enforceability  is considered in a proceeding
                  in  equity or at law)  and,  as to rights of  indemnification,
                  contribution  and waiver,  by  principles  of public policy or
                  federal or provincial securities laws relating thereto.

                           (ix)  To  such  counsel's  knowledge,   no  legal  or
                  governmental  proceedings  are pending or  threatened to which
                  Canadian  Abraxas  or  Cascade  is a  party  or to  which  the
                  property or assets of Canadian  Abraxas or Cascade is subject,
                  before or  brought  by any  court,  arbitrator  or  government
                  agency or body  which,  if  determined  adversely  to Canadian
                  Abraxas  or  Cascade,  would  result,  individually  or in the
                  aggregate,  in a Material  Adverse  Effect,  or which seeks to
                  restrain,  enjoin,  prevent the  consummation  of or otherwise
                  challenge  the issuance or sale of the  Securities  to be sold
                  hereunder  or  the  consummation  of  the  other  transactions
                  described in the Final Memorandum.

                           (x) To such  counsel's  knowledge,  none of  Canadian
                  Abraxas  or  Cascade  is (A) in  violation  of its  charter or
                  bylaws (or similar organizational  document), (B) in breach or

                                       24


                  violation of any statute,  judgment,  decree,  order,  rule or
                  regulation   applicable  to  any  of  them  or  any  of  their
                  respective properties or assets, except for any such breach or
                  violation  which would not,  individually or in the aggregate,
                  have a Material Adverse Effect, or (C) in breach of or default
                  under  (nor has any  event  occurred  which,  with  notice  or
                  passage of time or both,  would constitute a default under) or
                  in violation of any of the terms or provisions of any Contract
                  known to such  counsel,  except for any such breach,  default,
                  violation  or event  which would not,  individually  or in the
                  aggregate, have a Material Adverse Effect.

                           (xi)  The  execution,  delivery  and  performance  by
                  Canadian  Abraxas of the  Purchase  Agreement  and each of the
                  other Operative  Documents (to the extent a party thereto) and
                  the consummation of the transactions  contemplated  hereby and
                  thereby (including,  without limitation, the issuance and sale
                  of the Securities to the Initial Purchaser and the issuance of
                  the Exchange Notes in the Exchange Offer), do not and will not
                  conflict with or constitute or result in a breach or a default
                  under (or an event  which  with  notice or  passage of time or
                  both would  constitute  a default  under) or  violation  of or
                  cause an  acceleration  of any obligation  under, or result in
                  the  imposition or creation of (or the obligation to create or
                  impose) a Lien on any properties or assets of Canadian Abraxas
                  or Cascade with respect to (i) the terms or  provisions of any
                  Contract known to such counsel,  except for any such conflict,
                  breach,   violation,   default  or  event   which  would  not,
                  individually  or in the  aggregate,  have a  Material  Adverse
                  Effect,  (ii) the certificate of  incorporation  or bylaws (or
                  similar  organizational   document)  of  Canadian  Abraxas  or
                  Cascade,    or   (iii)   (assuming   the   accuracy   of   the
                  representations  and  warranties  of the Initial  Purchaser in
                  Section 8 hereof) any statute,  judgment,  decree, order, rule
                  or  regulation  known  to such  counsel  to be  applicable  to
                  Canadian  Abraxas  or  Cascade  or  any  of  their  respective
                  properties or assets, except for any such conflict,  breach or
                  violation  which would not,  individually or in the aggregate,
                  have a Material Adverse Effect.

                           (xii) To the  knowledge  of such  counsel no consent,
                  waiver,  approval,   authorization  or  order  of  or  filing,
                  registration,  qualification, license or permit of or with any
                  court  or  governmental  agency  or body,  or  third  party is
                  required for the issuance and sale by Canadian  Abraxas of the
                  Notes to the Initial Purchaser or the consummation by Canadian
                  Abraxas of the other  transactions  contemplated  hereby under
                  the laws of Alberta  except those which have  previously  been
                  obtained or made.
                           (xiii)  The   statements   set  forth  in  the  final
                  Memorandum  under the captions  "Business-Regulatory  Matters"
                  and   "Certain   United   States  and   Canadian   Income  Tax

                                       25


                  Considerations,"  insofar as they  address  matters of Alberta
                  law or the laws of Canada  applicable  therein  and subject to
                  the limitations set forth therein,  insofar as such statements
                  constitute  a summary  of the  matters  referred  to  therein,
                  fairly  and  accurately  present  the  information   disclosed
                  therein in all material respects.

                           (xiv) The laws of the  Province of  Alberta,  Canada,
                  permit  an  action  to be  brought  in a  court  of  competent
                  jurisdiction  on any final and conclusive  judgment in persona
                  for a sum certain in money of a court of the State of New York
                  in favor of  persons of a foreign  jurisdiction,  which is not
                  impeachable  as void or voidable  under the  internal  laws of
                  such  foreign  jurisdiction,   for  a  sum  certain,   without
                  reexamination or relitigation of the matters  adjudicated upon
                  if:

                                    a) the Court  rendering  such  judgment  had
                           jurisdiction,  in accordance with Alberta conflict of
                           law rules,  over the judgment  debtor (and submission
                           by Canadian  Abraxas to the  jurisdiction  of the New
                           York Court  pursuant to the Operative  Documents will
                           suffice for this purpose).

                                    b) such  judgment  was not obtained by fraud
                           or in a manner  contrary  to natural  justice and the
                           enforcement  thereof  would not be contrary to public
                           policy,  as such term is understood under the laws of
                           Alberta  and the  federal  laws of Canada  applicable
                           therein;

                                    c) the enforcement of such judgment does not
                           constitute,  directly or indirectly,  the enforcement
                           of foreign revenues,  expropriation,  penal or public
                           laws;

                                    d) no new  admissible  evidence  relevant to
                           the action is  discovered  prior to the  rendering of
                           judgment by the Alberta Court; and

                                    e) the action to enforce  such  judgment  is
                           commenced  within  10  years  after  the date of such
                           judgment.

                           (xv) In the event that any of the Operative Documents
                  are sought to be enforced in any action or  proceeding  in the
                  Province of Alberta,  Canada,  in accordance  with the laws of
                  the State of New York,  the courts of the Province of Alberta,
                  Canada, would recognize the choice of laws and would apply the
                  laws  of  the  State  of  New  York  in  any  such  action  or
                  proceeding,  upon  appropriate  evidence as to such laws being
                  adduced,   provided  that  none  of  the  provisions  of  such

                                       26


                  agreements or instruments,  as the case may be, or of the laws
                  of the State of New York are  contrary  to public  policy,  as
                  such  term is  understood  under  the law of the  Province  of
                  Alberta,  Canada  and,  an Alberta  court will not apply those
                  laws of New York which it characterizes as being of a revenue,
                  expropriatory,  penal or public  law  nature and in matters of
                  procedure, the laws of Alberta will be applied.

                           At the  time  the  foregoing  opinion  is  delivered,
                  Osler,   Hoskin  &  Harcourt  shall  additionally  state  that
                  although it has not independently  verified and is not passing
                  upon  and  assumes  no   responsibility   for  the   accuracy,
                  completeness  or fairness of the  statements  contained in the
                  Final Memorandum (except to the extent specified in subsection
                  (xiv),  no facts have come to its  attention  which lead it to
                  believe that the Final  Memorandum,  on the date thereof or at
                  the Closing Date,  contained an untrue statement of a material
                  fact or omitted to state a material fact required to be stated
                  therein or necessary to make the statements contained therein,
                  in light of the circumstances  under which they were made, not
                  misleading (it being understood that such firm need express no
                  opinion with respect to the financial  statements  and related
                  notes  thereto  and  the  other  financial,   statistical  and
                  accounting data included in the Final Memorandum).

                           In rendering the foregoing opinions,  Osler, Hoskin &
                  Harcourt may rely,  to the extent such counsel  deems  proper,
                  upon the representations and certifications of officers of the
                  Issuers or of public  officials  and shall not be  required to
                  opine on the  effect  of any  statutes  or laws of the  United
                  States  and  may  restrict  its  opinion  to the  laws  of the
                  Province of Alberta and the laws of Canada applicable therein.

                           References to the Final Memorandum in this subsection
                  (a) shall include any amendment or supplement thereto prepared
                  in accordance  with the  provisions  of this  Agreement at the
                  Closing Date.

                  (c) On the  Closing  Date,  the Initial  Purchaser  shall have
         received the opinion, in form and substance satisfactory to the Initial
         Purchaser,  dated as of the Closing  Date and  addressed to the Initial
         Purchaser,   of  Vinson  &  Elkins  L.L.P.,  counsel  for  the  Initial
         Purchaser,  with  respect to certain  legal  matters  relating  to this
         Agreement and such other related  matters as the Initial  Purchaser may
         reasonably require.  In rendering such opinion,  Vinson & Elkins L.L.P.
         shall  have  received  and may rely  upon such  certificates  and other
         documents and  information  as it may  reasonably  request to pass upon
         such matters.

                                       27


                  (d) The Initial  Purchaser  shall have  received  from each of
         Ernst & Young LLP,  Deloitte & Touche LLP, KPMG Chartered  Accountants,
         Arthur  Andersen  LLP and  Price  Waterhouse  LLP a  comfort  letter or
         letters  dated  the  date  hereof  and the  Closing  Date,  in form and
         substance satisfactory to counsel for the Initial Purchaser.

                  (e)  The   representations   and  warranties  of  the  Issuers
         contained in this  Agreement  shall be true and correct in all material
         respects on and as of the date hereof and on and as of the Closing Date
         as if  made  on and as of  the  Closing  Date;  the  statements  of the
         Issuers'  officers  made  pursuant  to  any  certificate  delivered  in
         accordance with the provisions  hereof shall be true and correct in all
         material  respects  on  and as of the  date  made  and on and as of the
         Closing  Date;  the Issuers  shall have  performed  all  covenants  and
         agreements  and satisfied all  conditions on their part to be performed
         or satisfied  hereunder at or prior to the Closing Date; and, except as
         described  in the  Final  Memorandum  (exclusive  of any  amendment  or
         supplement  thereto after the date  hereof),  subsequent to the date of
         the most recent financial  statements in such Final  Memorandum,  there
         shall have been no event or development,  and no information shall have
         become known, that,  individually or in the aggregate,  has or would be
         reasonably likely to have a Material Adverse Effect.

                  (f) The sale of the Securities hereunder shall not be enjoined
         (temporarily or permanently) on the Closing Date.

                  (g)  Subsequent  to the  date  of the  most  recent  financial
         statements  in the Final  Memorandum  (exclusive  of any  amendment  or
         supplement  thereto after the date hereof),  none of the Issuers or any
         of the Subsidiaries  shall have sustained any loss or interference with
         respect to its  business or  properties  from fire,  flood,  hurricane,
         accident or other  calamity,  whether or not covered by  insurance,  or
         from any strike, labor dispute,  slow down or work stoppage or from any
         legal or  governmental  proceeding,  order  or  decree,  which  loss or
         interference,  individually  or in  the  aggregate,  has  or  would  be
         reasonably likely to have a Material Adverse Effect.

                  (h) The Initial Purchaser shall have received a certificate of
         the Company, dated the Closing Date, signed on behalf of the Company by
         its Chairman of the Board,  President or any Senior Vice  President and
         the Chief Financial Officer, to the effect that:

                           (i) The representations and warranties of the Issuers
                  contained in this  Agreement are true and correct on and as of
                  the date  hereof and on and as of the  Closing  Date,  and the
                  Issuers  have  performed  all  covenants  and  agreements  and
                  satisfied  all  conditions  on their part to be  performed  or

                                       28


                  satisfied hereunder at or prior to the Closing Date;

                           (ii) At the  Closing  Date,  since the date hereof or
                  since the date of the most recent financial  statements in the
                  Final  Memorandum  (exclusive  of any  amendment or supplement
                  thereto after the date hereof),  no event or  development  has
                  occurred,   and  no  information   has  become  known,   that,
                  individually  or in the aggregate,  has or would be reasonably
                  likely to have a Material Adverse Effect  (including,  without
                  limitation,  any  material  downward  revision in the Issuer's
                  estimated  proved  reserves) other than any such effect caused
                  solely by  decreases  in the prices of crude oil,  natural gas
                  liquids and natural gas; and

                           (iii) The sale of the  Securities  hereunder  has not
                  been enjoined (temporarily or permanently).

                  (i) On the  Closing  Date,  the Initial  Purchaser  shall have
         received  the  Registration  Rights  Agreement  executed by each of the
         Issuers  and such  agreement  shall be in full  force and effect at all
         times from and after the Closing Date.

                  (j) On or before the Closing Date,  the Initial  Purchaser and
         counsel for the Initial  Purchaser  shall have  received  such  further
         documents, opinions, certificates, letters and schedules or instruments
         relating to the business, corporate, legal and financial affairs of the
         Issuers as they shall have heretofore reasonably requested.

                  (k) On the  Closing  Date,  the Initial  Purchaser  shall have
         received  letters,  dated as of the Closing  Date and  addressed to the
         Initial  Purchaser of,  DeGolyer & MacNaughton,  independent  petroleum
         engineers  for the  Company,  in form  and  substance  satisfactory  to
         counsel for the Initial Purchaser.

         All such  documents,  opinions,  certificates,  letters,  schedules  or
instruments delivered pursuant to this Agreement will comply with the provisions
hereof only if they are reasonably  satisfactory in all material respects to the
Initial  Purchaser  and  counsel for the Initial  Purchaser.  The Issuers  shall
furnish  to the  Initial  Purchaser  such  conformed  copies of such  documents,
opinions, certificates, letters, schedules and instruments in such quantities as
the Initial Purchaser shall reasonably request.

         8. Offering of Securities;  Restrictions  on Transfer.  (a) The Initial
Purchaser  represents  and  warrants  (as to itself  only) that it is a QIB. The
Initial  Purchaser  agrees with the Issuers (as to itself  only) that (i) it has
not and will not solicit  offers for, or offer or sell,  the  Securities  by any
form of general  solicitation or general advertising (as those terms are used in
Regulation D under the Act) or in any manner  involving a public offering within

                                       29


the meaning of Section 4(2) of the Act; and (ii) it has and will solicit  offers
for the Securities  only from, and will offer the Securities  only to (A) in the
case of offers inside the United States,  (x) persons whom the Initial Purchaser
reasonably  believes to be QIBs or, if any such person is buying for one or more
institutional  accounts  for which such person is acting as  fiduciary or agent,
only when such person has  represented  to the Initial  Purchaser that each such
account is a QIB,  to whom  notice has been given that such sale or  delivery is
being made in reliance on Rule 144A,  and, in each case, in  transactions  under
Rule 144A or (y) a limited number of other  institutional  investors  reasonably
believed by the Initial  Purchaser to be  Accredited  Investors  that,  prior to
their  purchase of the  Securities,  deliver to the  Initial  Purchaser a letter
containing the  representations and agreements set forth in Annex A to the Final
Memorandum and (B) in the case of offers  outside the United States,  to persons
other than U.S. persons  ("foreign  purchaser," which term shall include dealers
or other professional fiduciaries in the United States acting on a discretionary
basis for foreign beneficial owners (other than an estate or trust));  provided,
however,  that,  in the case of this clause (B), in purchasing  such  Securities
such  persons are deemed to have  represented  and agreed as provided  under the
caption  "Notice to  Investors"  contained in the Final  Memorandum  (or, if the
Final Memorandum is not in existence, in the most recent Memorandum).

                  (b) The  Initial  Purchaser  represents  and  warrants  (as to
         itself only) with respect to offers and sales outside the United States
         that  (i)  it  has  and  will  comply  with  all  applicable  laws  and
         regulations in each jurisdiction in which it acquires, offers, sells or
         delivers  Securities  or has  in  its  possession  or  distributes  any
         Memorandum or any such other material,  in all cases at its own expense
         including,  without  limitation,  that the Securities have not been and
         will not be offered or sold to  residents  of the  Province of Alberta,
         Canada;  (ii) the  Securities  have not been and will not be offered or
         sold within the United  States or to, or for the account or benefit of,
         U.S.  persons except in accordance  with  Regulation S under the Act or
         pursuant to an exemption from the registration requirements of the Act;
         (iii)  it has  offered  the  Securities  and  will  offer  and sell the
         Securities  (A)  as  part  of its  distribution  at any  time  and  (B)
         otherwise  until 40 days  after  the later of the  commencement  of the
         offering  and the Closing  Date,  only in  accordance  with Rule 903 of
         Regulation S and, accordingly, neither it nor any persons acting on its
         behalf have  engaged or will  engage in any  directed  selling  efforts
         (within the meaning of  Regulation  S) with respect to the  Securities,
         and any such  persons  have  complied and will comply with the offering
         restrictions  requirement  of Regulation S; and (iv) it agrees that, at
         or prior to confirmation of sales of the Securities,  it will have sent
         to each distributor,  dealer or person receiving a selling  concession,
         fee or other remuneration that purchases  Securities from it during the
         restricted  period  a  confirmation  or  notice  to  substantially  the
         following effect:

                                       30


                  The Securities  covered hereby have not been registered  under
         the United States Securities Act of 1933 (the "Securities Act") and may
         not be offered  and sold  within  the  United  States or to, or for the
         account or benefit of, U.S.  persons (i) as part of the distribution of
         the  Securities at any time or (ii)  otherwise  until 40 days after the
         later of the  commencement  of the offering and the closing date of the
         offering,  except in either case in  accordance  with  Regulation S (or
         Rule 144A if available) under the Securities Act. Terms used above have
         the meaning given to them in Regulation S."

Terms  used in this  Section  8(b) and not  defined in this  Agreement  have the
meanings given to them in Regulation S.

                  (c) The  Initial  Purchaser  represents  and  warrants  (as to
         itself  only) that the source of funds  being used by it to acquire the
         Securities  does not include the assets of any "employee  benefit plan"
         (within  the  meaning of Section 3 of ERISA) or any "plan"  (within the
         meaning of Section 4975 of the Code).

         9. Indemnification and Contribution.  (a)The Issuers and any Subsidiary
Guarantors  agree,  jointly and  severally,  to indemnify  and hold harmless the
Initial  Purchaser,  its  affiliates  and each person,  if any, who controls the
Initial  Purchaser  within the meaning of Section 15 of the Act or Section 20 of
the Exchange Act,  against any losses,  claims,  damages or liabilities to which
any Initial  Purchaser or such  controlling  person may become subject under the
Act, the Exchange Act or otherwise,  insofar as any such losses, claims, damages
or liabilities (or actions in respect thereof) arise out of or are based upon:

                           (i) any untrue  statement or alleged untrue statement
                  of  any  material  fact  contained  in any  Memorandum  or any
                  amendment or supplement  thereto or any  application  or other
                  document, or any amendment or supplement thereto,  executed by
                  an Issuer or based upon written information furnished by or on
                  behalf  of an  Issuer  filed in any  jurisdiction  in order to
                  qualify the Securities under the securities or "Blue Sky" laws
                  thereof or filed with any securities association or securities
                  exchange (each an "Application"); or

                           (ii) the  omission or alleged  omission to state,  in
                  the  Memorandum or any amendment or supplement  thereto or any
                  Application,  a material fact required to be stated therein or
                  necessary to make the statements  therein, in the light of the
                  circumstances under which they were made, not misleading,

and will reimburse, as incurred, the Initial Purchaser,  each such affiliate and

                                       31


each  such  controlling  person  for any  reasonable  legal or other  reasonable
expenses incurred by the Initial  Purchaser,  such affiliate or such controlling
person in connection  with  investigating,  defending  against or appearing as a
third-party witness in connection with any such loss, claim,  damage,  liability
or action;  provided,  however,  that the Issuers and the Subsidiary  Guarantors
will not be liable in any such case to the  extent  that any such  loss,  claim,
damage,  or  liability  arises out of or is based upon any untrue  statement  or
alleged untrue  statement or omission or alleged omission made in the Memorandum
or any amendment or supplement  thereto or any  Application in reliance upon and
in  conformity  with  written  information   concerning  the  Initial  Purchaser
furnished to an Issuer by the Initial  Purchaser  specifically  for use therein.
This  indemnity  agreement will be in addition to any liability that the Issuers
and the Subsidiary Guarantors may otherwise have to the indemnified parties. The
Issuers and the Subsidiary  Guarantors  shall not be liable under this Section 9
for any settlement of any claim or action  effected  without their prior written
consent, which shall not be unreasonably withheld.

         The Initial  Purchaser shall not,  without the prior written consent of
the Issuers,  effect any  settlement  or compromise of any pending or threatened
proceeding  in respect  of which any  Issuer is or could  have been a party,  or
indemnity could have been sought hereunder by any Issuer, unless such settlement
(A)  included  an  unconditional  written  release of the  Issuers,  in form and
substance reasonably  satisfactory to the Issuers,  from all liability on claims
that are the  subject  matter of such  proceeding  and (B) does not  include any
statement as to an admission  of fault,  culpability  or failure to act by or on
behalf of any Issuer.

                  (b)  The  Initial  Purchaser  agrees  to  indemnify  and  hold
         harmless the Issuers and the Subsidiary  Guarantors,  their  respective
         directors and their  respective  officers and each person,  if any, who
         controls  an Issuer  within  the  meaning  of  Section 15 of the Act or
         Section 20 of the Exchange Act against any losses,  claims,  damages or
         liabilities to which an Issuer or any of the  Subsidiary  Guarantors or
         any such  director,  officer or  controlling  person may become subject
         under the Act, the Exchange Act or  otherwise,  insofar as such losses,
         claims,  damages or liabilities  (or actions in respect  thereof) arise
         out of or are based upon (i) any  untrue  statement  or alleged  untrue
         statement  of any material  fact  contained  in any  Memorandum  or any
         amendment  or  supplement  thereto  or any  Application,  or  (ii)  the
         omission  or the  alleged  omission  to state  therein a material  fact
         required to be stated in any  Memorandum or any amendment or supplement
         thereto  or any  Application,  or  necessary  to  make  the  statements
         therein,  in the light of the circumstances under which they were made,
         not  misleading,  in each case to the  extent,  but only to the extent,
         that such untrue  statement or alleged untrue  statement or omission or
         alleged  omission  was made in  reliance  upon and in  conformity  with
         written information  concerning the Initial Purchaser,  furnished to an
         Issuer by the  Initial  Purchaser  specifically  for use  therein;  and

                                       32


         subject to the limitation set forth immediately  preceding this clause,
         will  reimburse,  as incurred,  any reasonable  legal or other expenses
         incurred by an Issuer or any of the  Subsidiary  Guarantors or any such
         director,   officer   or   controlling   person  in   connection   with
         investigating  or  defending  against  or  appearing  as a third  party
         witness in connection with any such loss, claim,  damage,  liability or
         action in respect thereof. This indemnity agreement will be in addition
         to any liability  that the Initial  Purchaser may otherwise have to the
         indemnified  parties.  The Initial  Purchaser shall not be liable under
         this  Section 9 for any  settlement  of any  claim or  action  effected
         without their consent, which shall not be unreasonably withheld.

         The Issuers shall not, without the prior written consent of the Initial
Purchaser,  effect any  settlement  or  compromise  of any pending or threatened
proceeding  in respect of which any  Initial  Purchaser  is or could have been a
party, or indemnity could have been sought  hereunder by any Initial  Purchaser,
unless such  settlement  (A) includes an  unconditional  written  release of the
Initial Purchaser,  in form and substance reasonably satisfactory to the Initial
Purchaser,  from all  liability  on claims that are the  subject  matter of such
proceeding  and (B) does not include any  statement as to an admission of fault,
culpability or failure to act by or on behalf of any Initial Purchaser.

                  (c) Promptly after receipt by an indemnified  party under this
         Section 9 of notice of the  commencement  of any  action for which such
         indemnified party is entitled to indemnification  under this Section 9,
         such  indemnified  party will,  if a claim in respect  thereof is to be
         made  against the  indemnifying  party under this Section 9, notify the
         indemnifying  party of the  commencement  thereof in  writing;  but the
         omission to so notify the  indemnifying  party (i) will not relieve the
         indemnifying  party from any liability under paragraph (a) or (b) above
         unless and to the extent such failure  results in the forfeiture by the
         indemnifying  party of  substantial  rights and  defenses and (ii) will
         not, in any event,  relieve the indemnifying party from any obligations
         to any  indemnified  party  other than the  indemnification  obligation
         provided in  paragraphs  (a) and (b) above.  In case any such action is
         brought against any indemnified party, and it notifies the indemnifying
         party of the  commencement  thereof,  the  indemnifying  party  will be
         entitled to  participate  therein  and, to the extent that it may wish,
         jointly with any other indemnifying party similarly notified, to assume
         the defense  thereof,  with  counsel  reasonably  satisfactory  to such
         indemnified party;  provided,  however,  that if (i) the use of counsel
         chosen by the  indemnifying  party to represent the  indemnified  party
         would  present  such  counsel  with a conflict  of  interest,  (ii) the
         defendants in any such action  include both the  indemnified  party and
         the  indemnifying  party  and the  indemnified  party  shall  have been
         advised  by  counsel  that  there  may be one or  more  legal  defenses
         available to it and/or  other  indemnified  parties that are  different
         from or additional to those  available to the  indemnifying  party,  or
         (iii) the indemnifying party shall not have employed counsel reasonably

                                       33


         satisfactory  to the  indemnified  party to represent  the  indemnified
         party within a reasonable time after receipt by the indemnifying  party
         of notice of the  institution of such action,  then, in each such case,
         the  indemnifying  party shall not have the right to direct the defense
         of such action on behalf of such indemnified  party or parties and such
         indemnified  party or parties  shall have the right to select  separate
         counsel to defend  such action on behalf of such  indemnified  party or
         parties.  After notice from the indemnifying  party to such indemnified
         party of its election so to assume the defense  thereof and approval by
         such indemnified party of counsel appointed to defend such action,  the
         indemnifying  party will not be liable to such indemnified  party under
         this Section 9 for any legal or other  expenses,  other than reasonable
         costs of investigation, subsequently incurred by such indemnified party
         in  connection  with the defense  thereof,  unless (i) the  indemnified
         party  shall have  employed  separate  counsel in  accordance  with the
         proviso to the  immediately  preceding  sentence (it being  understood,
         however,  that in connection  with such action the  indemnifying  party
         shall not be liable for the expenses of more than one separate  counsel
         (in  addition  to local  counsel)  in any one  action or  separate  but
         substantially  similar actions in the same jurisdiction  arising out of
         the  same  general  allegations  or  circumstances,  designated  by the
         Initial Purchaser in the case of paragraph (a) of this Section 9 or the
         Issuers in the case of paragraph  (b) of this  Section 9,  representing
         the  indemnified  parties under such paragraph (a) or paragraph (b), as
         the case may be, who are parties to such action or actions) or (ii) the
         indemnifying  party has authorized in writing the employment of counsel
         for the  indemnified  party at the expense of the  indemnifying  party.
         After  such  notice  from the  indemnifying  party to such  indemnified
         party,  the  indemnifying  party  will not be liable  for the costs and
         expenses of any settlement of such action effected by such  indemnified
         party  without  the prior  written  consent of the  indemnifying  party
         (which  consent  shall  not  be  unreasonably  withheld),  unless  such
         indemnified party waived in writing its rights under this Section 9, in
         which case the indemnified  party may effect such a settlement  without
         such consent.

                  (d) In circumstances in which the indemnity agreement provided
         for in the preceding paragraphs of this Section 9 is unavailable to, or
         insufficient to hold harmless,  an indemnified  party in respect of any
         losses, claims, damages or liabilities (or actions in respect thereof),
         each  indemnifying  party,  in order to provide for just and  equitable
         contribution,  shall  contribute  to the amount paid or payable by such
         indemnified  party as a  result  of such  losses,  claims,  damages  or
         liabilities  (or actions in respect  thereof) in such  proportion as is
         appropriate  to  reflect  (i) the  relative  benefits  received  by the
         indemnifying party or parties on the one hand and the indemnified party
         on the  other  from  the  offering  of the  Securities  or  (ii) if the
         allocation  provided by the  foregoing  clause (i) is not  permitted by
         applicable  law, not only such relative  benefits but also the relative

                                       34


         fault  of the  indemnifying  party or  parties  on the one hand and the
         indemnified  party on the other in  connection  with the  statements or
         omissions  or alleged  statements  or omissions  that  resulted in such
         losses, claims, damages or liabilities (or actions in respect thereof).
         The relative  benefits  received by the Issuers on the one hand and the
         Initial  Purchaser  on the  other  shall  be  deemed  to be in the same
         proportion as the total  proceeds from the offering  (before  deducting
         expenses)  received  by the  Issuers  bear to the total  discounts  and
         commissions  received by the Initial  Purchaser.  The relative fault of
         the parties  shall be  determined  by reference to, among other things,
         whether the untrue or alleged  untrue  statement of a material  fact or
         the  omission or alleged  omission to state a material  fact relates to
         information  supplied  by the  Issuers on the one hand,  or the Initial
         Purchaser on the other, the parties' relative intent, knowledge, access
         to information  and opportunity to correct or prevent such statement or
         omission or alleged  statement  or  omission,  and any other  equitable
         considerations  appropriate in the  circumstances.  The Issuers and the
         Initial Purchaser agree that it would not be equitable if the amount of
         such  contribution were determined by pro rata or per capita allocation
         or by any other  method of  allocation  that does not take into account
         the equitable  considerations referred to in the first sentence of this
         paragraph (d).  Notwithstanding  any other  provision of this paragraph
         (d), the Initial Purchaser shall not be obligated to make contributions
         hereunder that in the aggregate exceed the total discounts, commissions
         and other  compensation  received by the Initial  Purchaser  under this
         Agreement,  less the aggregate  amount of any damages that such Initial
         Purchaser has otherwise been required to pay by reason of the untrue or
         alleged  untrue  statements  or the  omissions or alleged  omissions to
         state  a   material   fact,   and  no  person   guilty  of   fraudulent
         misrepresentation  (within  the  meaning of  Section  11(f) of the Act)
         shall be entitled to contribution from any person who was not guilty of
         such fraudulent misrepresentation.  For purposes of this paragraph (d),
         each  affiliate  of the Initial  Purchaser,  each  person,  if any, who
         controls the Initial  Purchaser within the meaning of Section 15 of the
         Act or Section  20 of the  Exchange  Act shall have the same  rights to
         contribution as the Initial Purchaser,  and each director of an Issuer,
         each  officer of an Issuer and each  person,  if any,  who  controls an
         Issuer within the meaning of Section 15 of the Act or Section 20 of the
         Exchange  Act,  shall  have  the same  rights  to  contribution  as the
         Issuers.

         10.  Survival  Clause.  The  respective  representations,   warranties,
agreements,  covenants,  indemnities and other statements of the Issuers,  their
respective  officers and the Initial  Purchaser  set forth in this  Agreement or
made by or on behalf of them  pursuant to this  Agreement  shall  remain in full
force and effect,  regardless of (i) any  investigation  made by or on behalf of
the  Issuers,  any of  their  respective  officers  or  directors,  the  Initial
Purchaser  or any  controlling  person  referred to in Section 9 hereof and (ii)
delivery  of  and  payment  for  the  Securities.   The  respective  agreements,

                                       35


covenants,  indemnities  and other  statements set forth in Sections 6, 9 and 15
hereof shall remain in full force and effect,  regardless of any  termination or
cancellation of this Agreement.

         11.  Termination.  (a)This  Agreement  may be  terminated  in the  sole
discretion of the Initial  Purchaser by notice to the Issuers given prior to the
Closing Date in the event that either of the Issuers shall have failed,  refused
or been unable to perform all obligations and satisfy all conditions on its part
to be performed or satisfied hereunder at or prior thereto or, if at or prior to
the Closing Date:

                           (i) either of the Issuers  shall have  sustained  any
                  loss  or  interference  with  respect  to  its  businesses  or
                  properties  from fire,  flood,  hurricane,  accident  or other
                  calamity,  whether or not  covered by  insurance,  or from any
                  strike, labor dispute, slow down or work stoppage or any legal
                  or governmental proceeding, which loss or interference, in the
                  sole  judgment  of the  Initial  Purchaser,  has  had or has a
                  Material Adverse Effect, or there shall have been, in the sole
                  judgment of the Initial  Purchaser,  any event or  development
                  that,  individually  or in  the  aggregate,  has or  could  be
                  reasonably likely to have a Material Adverse Effect (including
                  without  limitation  a change in control of any of the Issuers
                  or the Subsidiaries),  except in each case as described in the
                  Final  Memorandum  (exclusive  of any  amendment or supplement
                  thereto);

                           (ii) trading in securities  generally on the New York
                  Stock Exchange, American Stock Exchange or the NASDAQ National
                  Market shall have been  suspended or minimum or maximum prices
                  shall have been established on any such exchange or market;

                           (iii) a banking  moratorium  shall have been declared
                  by New York or United States authorities;

                           (iv)  there  shall  have  been  (A)  an  outbreak  or
                  escalation  of  hostilities  between the United States and any
                  foreign  power,  or (B) an outbreak or escalation of any other
                  insurrection or armed conflict  involving the United States or
                  any other national or international calamity or emergency,  or
                  (C) any material change in the financial markets of the United
                  States which,  in the case of (A), (B) or (C) above and in the
                  sole judgment of the Initial Purchaser, makes it impracticable
                  or inadvisable to proceed with the offering or the delivery of
                  the Securities as contemplated by the Final Memorandum; or

                           (v) any  securities  of the  Issuers  shall have been
                  downgraded   or  placed  on  any  "watch  list"  for  possible

                                       36


                  downgrading by any nationally  recognized  statistical  rating
                  organization.

                  (b) Termination of this Agreement  pursuant to this Section 11
         shall be without  liability  of any party to any other party  except as
         provided in Section 10 hereof.

         12. Information  Supplied by the Initial Purchaser.  The statements set
forth in the last  paragraph on the front cover page,  the  paragraph  regarding
stabilization  on page ii, the second  sentence  on page 4 opposite  the caption
"Exchange Offer; Registration Rights" and in the third and fourth paragraphs and
the fourth,  fifth, sixth and seventh sentences of the fifth paragraph under the
heading  "Plan of  Distribution"  in the Final  Memorandum  (to the extent  such
statements  relate to the Initial  Purchaser)  constitute  the only  information
furnished  by the Initial  Purchaser to the Issuers for the purposes of Sections
2(a) and 9 hereof and the Initial  Purchaser  confirm that such  statements  are
correct as of the date hereof and as of the Closing Date.

         13. Notices.  All communications  hereunder shall be in writing and, if
sent to the  Initial  Purchaser,  shall be mailed or  delivered  to  Jefferies &
Company, Inc., 909 Fannin, Suite 3100, Houston, Texas 77010,  Attention:  Robert
W.  Carington,  Jr., with a copy to Vinson & Elkins L.L.P.,  1001 Fannin,  Suite
2300,  Houston,  Texas  77002-6760,  Attention:  Alan P.  Baden;  if sent to the
Issuers or the  Subsidiary  Guarantors,  if any, shall be mailed or delivered to
the Issuers at 500 North Loop 1604 East,  Suite 100, San  Antonio,  Texas 78232,
Attention: Robert L.G. Watson, with a copy to Cox & Smith Incorporated, 112 East
Pecan, Suite 1800, San Antonio, Texas 78205, Attention: Steven Jacobs.

         All such notices and  communications  shall be deemed to have been duly
given: when delivered by hand, if personally delivered; five business days after
being deposited in the mail,  postage prepaid,  if mailed;  and one business day
after being timely delivered to a next-day air courier.

         14.  Successors.  This  Agreement  shall inure to the benefit of and be
binding upon the Initial Purchaser,  the Issuers and the Subsidiary  Guarantors,
if any, and their respective successors and legal  representatives,  and nothing
expressed or  mentioned  in this  Agreement is intended or shall be construed to
give any other person any legal or equitable right,  remedy or claim under or in
respect of this Agreement,  or any provisions herein  contained;  this Agreement
and all conditions and provisions  hereof being intended to be and being for the
sole and  exclusive  benefit  of such  persons  and for the  benefit of no other
person  except  that  (i) the  indemnities  of the  Issuers  and the  Subsidiary
Guarantors,  if any,  contained in Section 9 of this Agreement shall also be for

                                       37


the benefit of any person or persons who  control the Initial  Purchaser  within
the meaning of Section 15 of the Act or Section 20 of the  Exchange Act and (ii)
the  indemnities  of the  Initial  Purchaser  contained  in  Section  9 of  this
Agreement  shall also be for the benefit of the directors of the Issuers and the
Subsidiary  Guarantors,  if any,  their  respective  officers  and any person or
persons  who  control an Issuer  within the  meaning of Section 15 of the Act or
Section 20 of the  Exchange  Act. No purchaser  of  Securities  from the Initial
Purchaser will be deemed a successor because of such purchase.

         15. APPLICABLE LAW. THE VALIDITY AND  INTERPRETATION OF THIS AGREEMENT,
AND THE TERMS AND CONDITIONS SET FORTH HEREIN SHALL BE GOVERNED BY AND CONSTRUED
IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF NEW YORK  APPLICABLE  TO CONTRACTS
MADE AND TO BE PERFORMED WHOLLY THEREIN, WITHOUT GIVING EFFECT TO ANY PROVISIONS
THEREOF RELATING TO CONFLICTS OF LAW.

         16.  Counterparts.  This  Agreement  may be  executed  in  two or  more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

         17.  Miscellaneous.  If,  on the  Closing  Date,  any  of  the  Initial
Purchaser  shall  fail or refuse to  purchase  Securities  that it has agreed to
purchase  hereunder on such date, and the aggregate  amount of Securities  which
such defaulting  Initial  Purchaser agreed but failed and refused to purchase is
not more than ten percent of the aggregate  amount of Securities to be purchased
on such date,  the other  Initial  Purchaser  shall be obligated to purchase the
Securities which such defaulting  Initial Purchaser agreed but failed or refused
to purchase on such date. If, on the Closing Date, any Initial  Purchaser  shall
fail or refuse to purchase  Securities which it agreed to purchase  hereunder on
such date and the  aggregate  amount of  Securities  with  respect to which such
default occurs is more than ten percent of the aggregate amount of Securities to
be purchased on such date and  arrangements  satisfactory  to the  nondefaulting
Initial  Purchaser and the Company for the purchase of such  Securities  are not
made within 36 hours after such default,  this Agreement shall terminate without
liability on the part of any nondefaulting  Initial Purchaser or of the Company,
except as  provided  in Section  10. In any such case  either the  nondefaulting
Initial  Purchaser  or the Company  shall have the right to postpone the Closing
Date,  but in no event for longer  than seven days,  in order that the  required
changes,  if  any,  in  the  Final  Memorandum  or in  any  other  documents  or
arrangements  may be effected.  Any action taken under this paragraph  shall not
relieve  any  defaulting  Initial  Purchaser  from  liability  in respect to any
default of such Initial Purchaser under this Agreement.

         18.  Agent  for  Service;   Submission  to   Jurisdiction;   Waiver  of
Immunities.  By the execution and delivery of this Agreement,  Canadian  Abraxas
(i)  acknowledges  that it has, by separate written  instrument,  designated and
appointed CT Corporation  System,  1633 Broadway,  New York, New York 10019 (and
any successor entity),  as its authorized agent upon which process may be served
in any suit or  proceeding  arising out of or relating  to this  Agreement,  the

                                       38


Registration Rights Agreement,  the Securities,  the Exchange Notes, the Private
Exchange  Notes,  if any, or the Indenture that may be instituted in any Federal
or state  court in the State of New York,  The City of New York,  the Borough of
Manhattan,  or brought under Federal or state  securities laws, and acknowledges
that CT Corporation  System has accepted such  designation,  (ii) submits to the
non-exclusive  jurisdiction of any such court in any such suit or proceeding and
(iii)  agrees that  service of process  upon CT  Corporation  System and written
notice of said service to Canadian  Abraxas in accordance  with Section 13 shall
be deemed in every respect effective service of process upon Canadian Abraxas in
any such suit or proceeding. Canadian Abraxas further agrees to take any and all
action,  including the  execution  and filing of any and all such  documents and
instruments, as may be necessary to continue such designation and appointment of
CT Corporation System in full force and effect so long as any of the Securities,
the Exchange  Notes,  the Private  Exchange Notes, if any, shall be outstanding;
provided that Canadian Abraxas may, by written notice to the Initial  Purchaser,
designate such additional or alternative agent for service of process under this
Section 18 that (i) maintains an office located in the Borough of Manhattan, The
City of New York in the  State of New  York;  (ii) is  either  (x)  counsel  for
Canadian  Abraxas or (y) a  corporate  service  company  which acts as agent for
service of process for other persons in the ordinary  course of its business and
(iii)  agrees to act as agent for  service of process  in  accordance  with this
Section  18.  Such  written  notice  shall  identify  the name of such agent for
service of process  and the  address of the office of such agent for  service of
process in the Borough of Manhattan, The City of New York, State of New York.

         19. Subsidiary  Guarantor a Party.  Immediately upon the designation of
any  Subsidiary of either Issuer as a Restricted  Subsidiary  (as defined in the
Indenture),  the Issuers shall cause such Subsidiary to become a party hereto as
a Subsidiary  Guarantor by executing and  delivering to the Initial  Purchaser a
counterpart hereof.


                                       39



         If  the  foregoing  correctly  sets  forth  our  understanding,  please
indicate your  acceptance  thereof in the space provided below for that purpose,
whereupon this letter shall constitute a binding  agreement  between the Issuers
and the Initial Purchaser.

                          Very truly yours,

                          ABRAXAS PETROLEUM CORPORATION


                            By:/s/ CHRIS E. WILLIFORD
                            Name: Chris E. Williford
                            Title: Executive Vice President, Chief Financial
                                   Officer and Treasurer


                          CANADIAN ABRAXAS PETROLEUM LIMITED

                            By:/s/ CHRIS E. WILLIFORD
                            Name: Chris E. Williford
                            Title: Vice President

The  foregoing  Agreement is hereby  confirmed and accepted as of the date first
above written.


JEFFERIES & COMPANY INC.


By: /s/ ROBERT CARINGTON
Name: Robert Carington
Title: Senior Vice President


                                       40





                                   SCHEDULE I



                  Subsidiaries of Abraxas Petroleum Corporation


Cascade Oil & Gas Ltd.
Western Associated Energy Corporation
VEI Acquisition Corp.
Canadian Abraxas Petroleum Limited






                                                                  EXHIBIT 10.2








                          REGISTRATION RIGHTS AGREEMENT

                          Dated as of January 27, 1998

                                  By and Among

                          ABRAXAS PETROLEUM CORPORATION

                                       and

                       CANADIAN ABRAXAS PETROLEUM LIMITED,

                                   as Issuers

                                       and

                           JEFFERIES & COMPANY, INC.,
                              as Initial Purchaser


                          11 1/2% Senior Notes due 2004







                               TABLE OF CONTENTS


                                                                         Page

1.       Definitions  ...................................................   1

2.       Exchange Offer..................................................   5

3.       Shelf Registration..............................................   9

4.       Liquidated Damages..............................................  11

5.       Registration Procedures.........................................  13

6.       Registration Expenses...........................................  25

7.       Indemnification.................................................  26

8.       Rules 144 and 144A..............................................  31

9.       Underwritten Registrations......................................  31

10.      Miscellaneous...................................................  32

         (a)      No Inconsistent Agreements.............................  32
         (b)      Adjustments Affecting Transfer Restricted Securities...  32
         (c)      Amendments and Waivers.................................  32
         (d)      Notices................................................  33
         (e)      Successors and Assigns.................................  33
         (f)      Release of Subsidiary Guarantors.......................  34
         (g)      Counterparts...........................................  34
         (h)      Headings...............................................  34
         (i)      Governing Law..........................................  34
         (j)      Severability...........................................  34
         (k)      Securities Held by the Issuers or Their
                      Affiliates.........................................  34
         (l)      Third Party Beneficiaries..............................  34
         (m)      Entire Agreement.......................................  35
         (n)      Information Supplied by the Participants...............  35
         (o)      Subsidiary Guarantor a Party...........................  35

                                       i






                          REGISTRATION RIGHTS AGREEMENT

                  This Registration  Rights Agreement (the "Agreement") is dated
as of January 27, 1998, by and among  ABRAXAS  PETROLEUM  CORPORATION,  a Nevada
corporation (the "Company"),  and CANADIAN ABRAXAS PETROLEUM LIMITED, an Alberta
corporation  and a wholly owned  subsidiary of the Company  ("Canadian  Abraxas"
and,  together with the Company,  the  "Issuers"),  as issuers,  and JEFFERIES &
COMPANY, INC. as initial purchaser (the "Initial Purchaser").

                  This Agreement is entered into in connection with the Purchase
Agreement,  dated as of  January  20,  1998,  by and among the  Issuers  and the
Initial Purchaser (the "Purchase Agreement"), which provides for the sale by the
Issuers to the Initial  Purchaser of $60,000,000  aggregate  principal amount of
the  Issuer's  11  1/2%  Senior  Notes  due  2004,   Series  C  (the   "Notes"),
unconditionally  guaranteed  on a senior basis by each of the  Company's  future
Restricted  Subsidiaries  (as  defined  in  the  Indenture)  (collectively,  the
"Subsidiary Guarantors"). In order to induce the Initial Purchaser to enter into
the  Purchase  Agreement,  the Issuers  have agreed to provide the  registration
rights set forth in this Agreement for the benefit of the Initial  Purchaser and
any  subsequent  holder or holders of the Notes.  The  execution and delivery of
this Agreement is a condition to the Initial Purchaser's  obligation to purchase
the Notes under the Purchase Agreement.

                  The parties hereby agree as follows:

1.       Definitions

                  As used in this Agreement,  the following terms shall have the
following meanings:

                  Advice:  See Section 5 hereof.

                  Agreement:  See the introductory paragraphs hereto.

                  Applicable Period:  See Section 2 hereof.

                  Canadian Abraxas:  See the introductory paragraphs hereto.

                  Company:  See the introductory paragraphs hereto.

                  Damages Payment Date: With respect to the Notes, each Interest
Payment Date.

                                       1


                  Effectiveness   Date:   With   respect  to  any   Registration
Statement, the 60th day after the Filing Date with respect thereto.

                  Effectiveness Period:  See Section 3 hereof.

                  Event Date:  See Section 4 hereof.

                  Exchange Act: The Securities Exchange Act of 1934, as amended,
and the rules and regulations of the SEC promulgated thereunder.

                  Exchange Notes:  See Section 2 hereof.

                  Exchange Offer:  See Section 2 hereof.

                  Exchange Offer Registration Statement:  See Section 2 hereof.

                  Filing Date:  If no  Registration  Statement has been filed by
the  Company  pursuant  to this  Agreement,  the 75th day after the Issue  Date;
provided,  however,  that if a Shelf Notice is given,  then the Filing Date with
respect to the Initial Shelf  Registration  shall be the 60th calendar day after
the date of the giving of such Shelf Notice.

                  Holder:  Any  holder  of a  Transfer  Restricted  Security  or
Transfer Restricted Securities or any holders of Series A/B Notes.

                  Indemnified Person:  See Section 7(c) hereof.

                  Indemnifying Person:  See Section 7(c) hereof.

                  Indenture: The Indenture, dated as of January 27, 1998, by and
among the Issuers and IBJ SCHRODER BANK & TRUST COMPANY, as trustee, pursuant to
which the Notes are being  issued,  as the same may be amended  or  supplemented
from time to time in accordance with the terms thereof.

                  Initial  Purchaser:  See the introductory paragraphs hereto.

                  Initial Shelf Registration:  See Section 3(a) hereof.

                  Inspectors:  See Section 5(o) hereof.

                  Interest  Payment  Date:  As defined in the  Indenture and the
Notes.

                  Issue Date: January 27, 1998, the date of original issuance of
the Notes.

                  Issuers:  See the introductory paragraphs hereto.

                                       2


                  Liquidated Damages:  See Section 4 hereof.

                  NASD:  See Section 5(t) hereof.

                  Participant:  See Section 7(a) hereof.

                  Participating Broker-Dealer:  See Section 2 hereof.

                  Person:  An  individual,  trustee,  corporation,  partnership,
joint  stock  company,  trust,  unincorporated   association,   union,  business
association, firm or other legal entity.

                  Private Exchange:  See Section 2 hereof.

                  Private Exchange Notes:  See Section 2 hereof.

                  Prospectus:   The  prospectus  included  in  any  Registration
Statement (including,  without limitation,  any prospectus subject to completion
and a  prospectus  that  includes  any  information  previously  omitted  from a
prospectus filed as part of an effective registration statement in reliance upon
Rule 430A promulgated under the Securities Act and any term sheet filed pursuant
to Rule 434 under  the  Securities  Act),  as  amended  or  supplemented  by any
prospectus  supplement,   and  all  other  amendments  and  supplements  to  the
Prospectus,  including post-effective  amendments, and all material incorporated
by reference or deemed to be incorporated by reference in such Prospectus.

                  Purchase Agreement:  See the introductory paragraphs hereof.

                  Records:  See Section 5(o) hereof.

                  Registration Default:  As defined in Section 4.

                  Registration  Statement:  Any  registration  statement  of the
Issuers and the Subsidiary Guarantors (if any) that covers any of the Notes, the
Exchange  Notes or the  Private  Exchange  Notes  filed  with the SEC  under the
Securities  Act,  including the  Prospectus,  amendments and supplements to such
registration statement,  including post-effective  amendments, all exhibits, and
all material incorporated by reference or deemed to be incorporated by reference
in such registration statement.

                  Rule 144: Rule 144  promulgated  under the Securities  Act, as
such Rule may be amended from time to time, or any similar rule (other than Rule
144A) or regulation  hereafter adopted by the SEC providing for offers and sales
of  securities  made in  compliance  therewith  resulting in offers and sales by
subsequent holders that are not affiliates of an issuer of such securities being

                                       3


free of the registration and prospectus delivery  requirements of the Securities
Act.

                  Rule 144A: Rule 144A promulgated  under the Securities Act, as
such Rule may be amended from time to time, or any similar rule (other than Rule
144) or regulation hereafter adopted by the SEC.

                  Rule 415: Rule 415  promulgated  under the Securities  Act, as
such Rule may be amended from time to time,  or any similar  rule or  regulation
hereafter adopted by the SEC.

                  SEC:  The Securities and Exchange Commission.

                  Securities  Act: The Securities  Act of 1933, as amended,  and
the rules and regulations of the SEC promulgated thereunder.

                  Series A/B Notes shall mean the  Issuer's 11 1/2% Senior Notes
due 2004 in the aggregate  principal  amount of $215,000,000  issued pursuant to
the  Indenture  dated as of  November  14,  1996,  between  the  Issuers and IBJ
Schroder Bank & Trust Company.

                  Shelf Notice:  See Section 2 hereof.

                  Shelf Registration:  See Section 3(b) hereof.

                  Subsequent Shelf Registration:  See Section 3(b) hereof.

                  TIA:  The Trust Indenture Act of 1939, as amended.

                  Transfer Restricted  Securities.  Each Note until (i) the date
on which such Note has been exchanged by a person other than a Broker-Dealer for
an  Exchange  Note in the  Exchange  Offer,  (ii)  following  the  exchange by a
Broker-Dealer  in the Exchange Offer of a Note for an Exchange Note, the date on
which  such  Exchange  Note  is sold  to a  purchaser  who  receives  from  such
Broker-Dealer  on or  prior to the  date of such  sale a copy of the  Prospectus
contained in the Exchange Offer Registration Statement,  (iii) the date on which
such  Note has been  effectively  registered  under the Act and  disposed  of in
accordance with the Shelf Registration  Statement or (iv) the date on which such
Note is distributed  to the public  pursuant to Rule 144 under the Act or may be
distributed to the public pursuant to Rule 144(k) under the Act.

                  Trustee:  The trustee  under the Indenture and the trustee (if
any) under any  indenture  governing  the  Exchange  Notes and Private  Exchange
Notes.

                                       4


                  Underwritten   registration   or  underwritten   offering:   A
registration  in which  securities of the Issuers are sold to an underwriter for
reoffering to the public.

2.       Exchange Offer

                  (a) To the extent  permitted by  applicable  law or applicable
interpretation  of the staff of the Division of Corporation  Finance of the SEC,
the  Issuers  shall  file  with  the SEC,  no later  than  the  Filing  Date,  a
Registration  Statement  (the  "Exchange  Offer  Registration  Statement") on an
appropriate  registration form with respect to a registered offer (the "Exchange
Offer") to exchange any and all of the Transfer Restricted Securities and Series
A/B Notes for a like aggregate  principal amount of notes (the "Exchange Notes")
of the Issuers (and the guarantees,  if any, of the Subsidiary  Guarantors) that
are  identical  in all  material  respects to the Notes and the Series A/B Notes
except that the Exchange  Notes (and the  guarantees,  if any, of the Subsidiary
Guarantors)  shall contain no  restrictive  legend  thereon.  The Exchange Offer
shall comply with all applicable  tender offer rules and  regulations  under the
Exchange Act and other  applicable  law. The Issuers shall use their  respective
best  efforts  to (x) cause the  Exchange  Offer  Registration  Statement  to be
declared effective under the Securities Act on or before the Effectiveness Date;
(y) keep the Exchange  Offer open for at least 30 days (or longer if required by
applicable  law) after the date that notice of the  Exchange  Offer is mailed to
Holders;  and (z)  consummate  the  Exchange  Offer on or prior to the 165th day
following the Issue Date. If, after the Exchange Offer Registration Statement is
initially  declared  effective by the SEC, the Exchange Offer or the issuance of
the Exchange Notes  thereunder is interfered with by any stop order,  injunction
or other order or  requirement  of the SEC or any other  governmental  agency or
court,  the Exchange Offer  Registration  Statement  shall be deemed not to have
become effective for purposes of this Agreement.

                  Each Holder that  participates  in the Exchange  Offer will be
required  to  represent  that any  Exchange  Notes to be  received by it will be
acquired  in the  ordinary  course  of its  business,  that  at the  time of the
consummation  of the  Exchange  Offer such  Holder will have no  arrangement  or
understanding with any Person to participate in the distribution of the Exchange
Notes in violation of the provisions of the Securities Act, and that such Holder
is not an affiliate of any of the Issuers  within the meaning of the  Securities
Act.


                  No securities  other than the Exchange Notes shall be included
in the Exchange Offer Registration Statement.

                  (b) The Issuers shall include within the Prospectus  contained
in the  Exchange  Offer  Registration  Statement  a  section  entitled  "Plan of
Distribution,"  reasonably  acceptable  to the  Holders,  which shall  contain a

                                       5


summary  statement of the  positions  taken or policies made by the staff of the
SEC with respect to the potential "underwriter" status of any broker-dealer that
is the  beneficial  owner (as defined in Rule 13d-3 under the  Exchange  Act) of
Exchange  Notes  received  by  such  broker-dealer  in  the  Exchange  Offer  (a
"Participating  Broker-Dealer"),  whether such  positions or policies  have been
publicly  disseminated  by the staff of the SEC or such  positions  or  policies
represent  the  prevailing  views  of  the  staff  of the  SEC.  Such  "Plan  of
Distribution"  section shall also expressly  permit,  to the extent permitted by
applicable policies and regulations of the SEC, the use of the Prospectus by all
Persons subject to the prospectus  delivery  requirements of the Securities Act,
including, to the extent permitted by applicable policies and regulations of the
SEC, all Participating  Broker-Dealers,  and include a statement  describing the
means by which  Participating  Broker-Dealers  may resell the Exchange  Notes in
compliance with the Securities Act.

                  The Issuers  shall use their  respective  best efforts to keep
the Exchange Offer Registration  Statement effective and to amend and supplement
the  Prospectus  contained  therein  in order to permit  such  Prospectus  to be
lawfully   delivered  by  all  Persons   subject  to  the  prospectus   delivery
requirements  of the  Securities  Act for such period of time as is necessary to
comply with  applicable law in connection  with any resale of the Exchange Notes
covered thereby;  provided,  however, that such period shall not exceed 180 days
after such Exchange Offer Registration  Statement is declared effective (or such
longer  period if extended  pursuant to the last  paragraph of Section 5 hereof)
(the "Applicable Period").

                  If, prior to consummation  of the Exchange  Offer,  any Holder
holds any Notes  acquired by it that have, or that are  reasonably  likely to be
determined  to  have,   the  status  of  an  unsold   allotment  in  an  initial
distribution,  or any Holder is not  entitled  to  participate  in the  Exchange
Offer, the Issuers upon the request of any such Holder shall simultaneously with
the delivery of the Exchange Notes in the Exchange  Offer,  issue and deliver to
any such Holder, in exchange (the "Private Exchange") for such Notes held by any
such Holder, a like principal amount of notes (the "Private  Exchange Notes") of
the Issuers that are  identical in all material  respects to the Exchange  Notes
and the  Subsidiary  Guarantors  if any shall  guarantee  such Private  Exchange
Notes. The Private Exchange Notes shall be issued pursuant to the same indenture
as the Exchange Notes and bear the same CUSIP number as the Exchange Notes.

                  Interest on the Exchange Notes and the Private  Exchange Notes
will accrue from (A) the later of (i) the last  interest  payment  date on which
interest was paid on the Notes  surrendered in exchange  therefor or (ii) if the
Notes are  surrendered  for  exchange on a date in a period  which  includes the
record date for an interest  payment  date to occur on or after the date of such
exchange  and as to  which  interest  will be paid,  the  date of such  interest

                                       6


payment date or (B) if no interest has been paid on the Notes,  from the date of
the original issuance of the Notes.

                  In connection with the Exchange Offer, the Issuers shall:

                  (1) mail,  or cause to be mailed,  to each Holder  entitled to
         participate in the Exchange Offer a copy of the Prospectus forming part
         of  the  Exchange  Offer  Registration  Statement,   together  with  an
         appropriate letter of transmittal and related documents;

                  (2) keep the  Exchange  Offer  open for not less  than 30 days
         after the date that notice of the  Exchange  Offer is mailed to Holders
         (or longer if required by applicable law);

                  (3) utilize  the  services of a  depositary  for the  Exchange
         Offer  with an address in the  Borough  of  Manhattan,  The City of New
         York;

                  (4) permit  Holders to withdraw  tendered  Notes or Series A/B
         Notes at any time prior to the close of business, New York time, on the
         last business day on which the Exchange Offer shall remain open; and

                  (5)  otherwise  comply  in  all  material  respects  with  all
         applicable laws, rules and regulations.

                  As soon as  practicable  after the close of the Exchange Offer
and the Private Exchange, if any, the Issuers shall:

                  (1) accept for exchange all Transfer Restricted Securities and
         Series A/B Notes validly tendered and not validly withdrawn pursuant to
         the Exchange Offer and the Private Exchange, if any;

                  (2)  deliver to the  Trustee  for  cancellation  all  Transfer
         Restricted  Securities  and Series A/B Notes so accepted for  exchange;
         and

                  (3) cause the Trustee to authenticate  and deliver promptly to
         each Holder of Notes,  Exchange Notes or Private Exchange Notes, as the
         case may be, equal in  principal  amount to the Notes of such Holder so
         accepted for exchange.

                  The  Exchange  Offer  and the  Private  Exchange  shall not be
subject to any  conditions,  other than that (i) the  Exchange  Offer or Private
Exchange,  as the case may be, does not violate applicable law or any applicable
interpretation  of the staff of the SEC, (ii) no action or proceeding shall have
been instituted or threatened in any court or by any  governmental  agency which
might materially  impair the ability of the Issuers to proceed with the Exchange
Offer or the Private  Exchange,  and no material adverse  development shall have

                                       7


occurred in any existing  action or  proceeding  with respect to the Issuers and
(iii) all governmental  approvals shall have been obtained,  which approvals the
Issuers deem  necessary for the  consummation  of the Exchange  Offer or Private
Exchange.

                  The  Exchange  Notes and the Private  Exchange  Notes shall be
issued under (i) the  Indenture  or (ii) an indenture  identical in all material
respects to the Indenture and which,  in either case, has been  qualified  under
the TIA or is exempt from such qualification and shall provide that the Exchange
Notes  shall  not be  subject  to the  transfer  restrictions  set  forth in the
Indenture.  The  Indenture  or such  indenture  shall  provide that the Exchange
Notes,  the Private Exchange Notes and the Notes shall vote and consent together
on all  matters as one class and that none of the  Exchange  Notes,  the Private
Exchange Notes or the Notes will have the right to vote or consent as a separate
class on any matter.

                  (c) If, (i) the Issuers  are not  required to file an Exchange
Offer  Registration  Statement  or permitted to  consummate  the Exchange  Offer
because the Exchange  Offer is not  permitted by  applicable  law or  Commission
policy  (after the  procedures  set forth in Section 5 below have been  complied
with) or (ii) any Holder of Transfer Restricted  Securities notifies the Issuers
prior to the 20th day following the  consummation of the Exchange Offer (A) that
such  Holder  is  prohibited  by  applicable  law  or  Commission   policy  from
participating  in the Exchange  Offer or (B) that such Holder may not resell the
Exchange  Notes  acquired  by it in the  Exchange  Offer to the  public  without
delivering a prospectus and that the Prospectus  contained in the Exchange Offer
Registration  Statement is not available  for such resales by such Holder,  then
the Issuers shall promptly deliver to the Holders and the Trustee written notice
thereof  (the "Shelf  Notice") and shall file a Shelf  Registration  pursuant to
Section 3 hereof.

3.       Shelf Registration

                  If at any time a Shelf Notice is delivered as  contemplated by
Section 2(c) hereof, then:

                  (a) Shelf Registration.  The Issuers shall file with the SEC a
Registration Statement for an offering to be made on a continuous basis pursuant
to Rule 415  covering  all of the  Transfer  Restricted  Securities  covered  by
Section 2(c)(ii) above (the "Initial Shelf Registration"). The Issuers shall use
their  respective  diligent  best efforts to file with the SEC the Initial Shelf
Registration  on or  before  the  applicable  Filing  Date.  The  Initial  Shelf
Registration  shall  be on  Form  S-1 or  another  appropriate  form  permitting
registration of such Transfer Restricted Securities for resale by Holders in the
manner or manners designated by them (including, without limitation, one or more
underwritten offerings).  The Issuers shall not permit any securities other than

                                       8


the  Transfer  Restricted  Securities  to  be  included  in  the  Initial  Shelf
Registration or any Subsequent Shelf Registration (as defined below).

                  The Issuers shall use their  respective  best efforts to cause
the Initial Shelf Registration to be declared effective under the Securities Act
on or prior to the Effectiveness Date and to keep the Initial Shelf Registration
continuously  effective  under the  Securities  Act until the date  which is two
years from the  Effectiveness  Date,  subject to extension  pursuant to the last
paragraph  of Section 5 hereof (the  "Effectiveness  Period"),  or such  shorter
period ending when (i) all Transfer Restricted Securities covered by the Initial
Shelf Registration have been sold in the manner set forth and as contemplated in
the Initial Shelf Registration or (ii) a Subsequent Shelf Registration  covering
all of the  Transfer  Restricted  Securities  covered  by and not sold under the
Initial Shelf  Registration or an earlier Subsequent Shelf Registration has been
declared  effective  under  the  Securities  Act;  provided,  however,  that the
Effectiveness  Period in  respect of the  Initial  Shelf  Registration  shall be
extended to the extent  required to permit dealers to comply with the applicable
prospectus  delivery  requirements  of Rule 174 under the  Securities Act and as
otherwise  provided  herein and shall be subject to reduction to the extent that
the applicable provisions of Rule 144 are amended or revised.

                  No holder of Transfer Restricted Securities may include any of
its Transfer Restricted Securities in any Shelf Registration  Statement pursuant
to this  Agreement  unless and until such  holder  furnishes  to the  Issuers in
writing, within 30 days after receipt of a request therefor, such information as
the  Issuers  may  reasonably  request  for use in  connection  with  any  Shelf
Registration Statement or Prospectus or preliminary prospectus included therein.
No holder of Transfer  Restricted  Securities  shall be  entitled to  Liquidated
Damages  pursuant to Section 4 hereof  unless and until such  holder  shall have
provided  all such  reasonably  requested  information.  Each holder of Transfer
Restricted  Securities  as to which any Shelf  Registration  Statement  is being
effected agrees to furnish  promptly to the Issuers all information  required to
be disclosed in order to make information previously furnished to the Issuers by
such Holder not materially misleading.

                  (b)  Subsequent  Shelf  Registrations.  If the  Initial  Shelf
Registration or any Subsequent Shelf Registration ceases to be effective for any
reason at any time during the  Effectiveness  Period  (other than because of the
sale of all of the  securities  registered  thereunder),  the Issuers  shall use
their  respective  best  efforts to obtain the  prompt  withdrawal  of any order
suspending the effectiveness  thereof,  and in any event shall within 30 days of
such cessation of effectiveness amend the Initial Shelf Registration in a manner
to obtain the withdrawal of the order suspending the effectiveness  thereof,  or
file an additional "shelf" Registration  Statement pursuant to Rule 415 covering
all of the  Transfer  Restricted  Securities  covered  by and not sold under the
Initial Shelf Registration or an earlier Subsequent Shelf Registration  (each, a

                                       9


"Subsequent Shelf  Registration").  If a Subsequent Shelf Registration is filed,
the Issuers  shall use their  respective  best  efforts to cause the  Subsequent
Shelf  Registration to be declared effective under the Securities Act as soon as
practicable  after such filing and to keep such  subsequent  Shelf  Registration
continuously  effective  for a  period  equal  to  the  number  of  days  in the
Effectiveness  Period less the aggregate number of days during which the Initial
Shelf   Registration  or  any  Subsequent  Shelf   Registration  was  previously
continuously  effective.  As used herein the term "Shelf Registration" means the
Initial Shelf Registration and any Subsequent Shelf Registration.

                  (c)  Supplements  and  Amendments.  The Issuers shall promptly
supplement  and  amend  any  Shelf   Registration  if  required  by  the  rules,
regulations or instructions  applicable to the  registration  form used for such
Shelf  Registration,  if  required  by  the  Securities  Act,  or if  reasonably
requested  by the Holders of a majority  in  aggregate  principal  amount of the
Transfer Restricted Securities covered by such Registration  Statement or by any
underwriter of such Transfer Restricted Securities.

4.       Liquidated Damages

                  (a) The  Issuers  and the  Initial  Purchaser  agree  that the
Holders  will suffer  damages if the Issuers fail to fulfill  their  obligations
under  Section  2 or  Section  3 hereof  and that it would  not be  feasible  to
ascertain the extent of such damages with  precision.  Accordingly,  the Issuers
agree, jointly and severally, to pay, as liquidated damages, additional interest
on the Notes  ("Liquidated  Damages") under the  circumstances and to the extent
set forth below (each of which shall be given independent effect):

                    (i) if (A) neither the Exchange Offer Registration Statement
         nor the Initial  Shelf  Registration  has been filed on or prior to the
         applicable  Filing Date or (B)  notwithstanding  that the Issuers  have
         consummated  or will  consummate  the Exchange  Offer,  the Issuers are
         required to file a Shelf  Registration  and such Shelf  Registration is
         not filed on or prior to the  Filing  Date  applicable  thereto,  then,
         commencing  on the day after any such Filing Date,  Liquidated  Damages
         shall accrue on the principal amount of the Notes at a rate of $.05 per
         week per $1,000  principal  amount of Notes held by such Holder for the
         first 90 days  immediately  following  each such Filing Date,  and such
         Liquidated  Damages shall  increase by an additional  $.05 per week per
         $1,000  principal  amount at the  beginning of each  subsequent  90-day
         period; or

                   (ii) if (A) neither the Exchange Offer Registration Statement
         nor the Initial Shelf  Registration is declared effective by the SEC on
         or prior to the relevant Effectiveness Date or (B) notwithstanding that
         the Issuers have consummated or will consummate the Exchange Offer, the
         Issuers  are  required  to file a Shelf  Registration  and  such  Shelf


                                       10


         Registration  is not  declared  effective by the SEC on or prior to the
         Effectiveness  Date  in  respect  of  such  Shelf  Registration,  then,
         commencing on the day after such Effectiveness Date, Liquidated Damages
         shall accrue on the principal amount of the Notes at a rate of $.05 per
         week per $1,000  principal  amount of Notes held by such Holder for the
         first 90 days  immediately  following the day after such  Effectiveness
         Date, and such Liquidated  Damages shall increase by an additional $.05
         per  week  per  $1,000  principal  amount  at  the  beginning  of  each
         subsequent 90-day period; or

                  (iii) if (A) the Issuers have not exchanged Exchange Notes for
         all Notes and Series A/B Notes validly  tendered in accordance with the
         terms of the  Exchange  Offer on or prior to the  165th  day  after the
         Issue Date or (B) if applicable, a Shelf Registration has been declared
         effective  and such Shelf  Registration  ceases to be  effective at any
         time during the  Effectiveness  Period,  then Liquidated  Damages shall
         accrue on the principal  amount of the Notes at a rate of $.05 per week
         per $1,000  principal amount of Notes held by such Holder for the first
         90 days  commencing  on the (x) 166th day after such Issue Date, in the
         case of (A) above, or (y) the day such Shelf Registration  ceases to be
         effective in the case of (B) above,  and such Liquidated  Damages shall
         increase by an additional $.05 per week per $1,000  principal amount at
         the  beginning of each such  subsequent  90-day period (each such event
         referred  to  in  clauses  (i)  through  (iii)  above  a  "Registration
         Default");

provided,  however,  that the Liquidated  Damages on the Notes may not exceed at
any one time in the aggregate $.20 per week per $1,000 principal amount of Notes
held by such Holder; provided, further, however, that (1) upon the filing of the
applicable  Exchange  Offer  Registration  Statement  or  the  applicable  Shelf
Registration  as  required  hereunder  (in the case of clause  (i) above of this
Section  4),  (2) upon the  effectiveness  of the  Exchange  Offer  Registration
Statement or the applicable Shelf  Registration  Statement as required hereunder
(in the case of clause (ii) of this  Section 4), or (3) upon the exchange of the
applicable Exchange Notes for all Notes tendered (in the case of clause (iii)(A)
of  this  Section  4),  or  upon  the  effectiveness  of  the  applicable  Shelf
Registration  Statement  which had  ceased to remain  effective  (in the case of
(iii)(B) of this Section 4), Liquidated Damages on the Notes in respect of which
such  events  relate  as a result  of such  clause  (or the  relevant  subclause
thereof), as the case may be, shall cease to accrue.

                  (b) The Issuers  shall notify the Trustee  within one business
day after  each and every  date on which an event  occurs  in  respect  of which
Liquidated  Damages are  required to be paid (an "Event  Date").  Any amounts of
Liquidated Damages due pursuant to (a)(i), (a)(ii) or (a)(iii) of this Section 4
will be payable  in cash  semi-annually  on each  Damages  Payment  Date (to the


                                       11


holders  of  record  (the  "Record  Holders")  on the  April 15 and  October  15
immediately preceding such dates), commencing with the first such date occurring
after any such Liquidated  Damages commence to accrue.  The amount of Liquidated
Damages will be determined by multiplying the applicable  Liquidated  Damages by
the  principal  amount of the Transfer  Restricted  Securities,  multiplied by a
fraction,  the numerator of which is the number of days such Liquidated  Damages
were  applicable  during such period  (determined on the basis of a 360-day year
comprised  of twelve  30-day  months  and, in the case of a partial  month,  the
actual number of days elapsed), and the denominator of which is 360. All accrued
Liquidated  Damages  shall be paid to the Record  Holders by the Issuers by wire
transfer  of  immediately  available  funds or by  federal  funds  check on each
Damages Payment Date.  Following the cure of all Registration  Defaults relating
to any  particular  Transfer  Restricted  Securities,  the accrual of Liquidated
Damages with respect to such Transfer Restricted Securities will cease.

5.       Registration Procedures

                  In connection  with the filing of any  Registration  Statement
pursuant to Sections 2 or 3 hereof,  the Issuers shall effect such registrations
to permit the sale of the  securities  covered  thereby in  accordance  with the
intended method or methods of disposition  thereof,  and pursuant thereto and in
connection with any  Registration  Statement filed by the Issuers  hereunder the
Issuers shall:

                  (a)  Prepare  and file  with the SEC  prior to the  applicable
         Filing Date, a  Registration  Statement or  Registration  Statements as
         prescribed  by Sections 2 or 3 hereof,  and use their  respective  best
         efforts to cause each such  Registration  Statement to become effective
         and remain effective as provided herein;  provided,  however,  that, if
         (1) such filing is pursuant  to Section 3 hereof,  or (2) a  Prospectus
         contained in the Exchange Offer  Registration  Statement filed pursuant
         to Section 2 hereof is required to be  delivered  under the  Securities
         Act by any Participating Broker-Dealer who seeks to sell Exchange Notes
         during  the  Applicable  Period  relating  thereto,  before  filing any
         Registration  Statement or Prospectus or any  amendments or supplements
         thereto,  the  Issuers  shall  furnish to and afford the Holders of the
         Transfer Restricted  Securities covered by such Registration  Statement
         or each such  Participating  Broker-Dealer,  as the case may be,  their
         counsel and the managing underwriters, if any, a reasonable opportunity
         to  review  copies  of all  such  documents  (including  copies  of any
         documents  to be  incorporated  by  reference  therein and all exhibits
         thereto) proposed to be filed (in each case at least five days prior to
         such  filing,   or  such  later  date  as  is   reasonable   under  the
         circumstances).  The Issuers shall not file any Registration  Statement
         or Prospectus or any amendments or  supplements  thereto if the Holders
         of a majority in aggregate  principal amount of the Transfer Restricted


                                       12


         Securities  covered  by  such  Registration   Statement,  or  any  such
         Participating Broker-Dealer,  as the case may be, their counsel, or the
         managing underwriters, if any, shall reasonably object.

                  (b)  Prepare  and  file  with  the  SEC  such  amendments  and
         post-effective  amendments  to each  Shelf  Registration  Statement  or
         Exchange Offer  Registration  Statement,  as the case may be, as may be
         necessary to keep such Registration  Statement  continuously  effective
         for the Effectiveness  Period or the Applicable Period, as the case may
         be; cause the related  Prospectus to be  supplemented by any Prospectus
         supplement  required by applicable  law, and as so  supplemented  to be
         filed  pursuant to Rule 424 (or any similar  provisions  then in force)
         promulgated under the Securities Act; and comply with the provisions of
         the Securities Act and the Exchange Act applicable to each of them with
         respect  to  the   disposition  of  all  securities   covered  by  such
         Registration  Statement  as so  amended  or in  such  Prospectus  as so
         supplemented  and  with  respect  to  the  subsequent   resale  of  any
         securities being sold by a Participating  Broker-Dealer  covered by any
         such  Prospectus.  The  Issuers  shall be deemed not to have used their
         respective  diligent  best  efforts  to keep a  Registration  Statement
         effective during the Effective Period or the Applicable  Period, as the
         case may be, relating thereto if any of the Issuers  voluntarily  takes
         any  action  that  would  result in  selling  Holders  of the  Transfer
         Restricted  Securities covered thereby or Participating  Broker-Dealers
         seeking to sell  Exchange  Notes not being  able to sell such  Transfer
         Restricted  Securities or such Exchange Notes during that period unless
         (i) such  action is  required by  applicable  law or (ii) such  Issuers
         comply with the  provisions of the last sentence of Section 5(k) or the
         last paragraph of this Section 5.

                  (c) If (1) a Shelf Registration is filed pursuant to Section 3
         hereof,   or  (2)  a  Prospectus   contained  in  the  Exchange   Offer
         Registration  Statement  filed pursuant to Section 2 hereof is required
         to  be  delivered  under  the  Securities  Act  by  any   Participating
         Broker-Dealer  who seeks to sell Exchange  Notes during the  Applicable
         Period  relating  thereto  from whom the Company has  received  written
         notice that it will be a  Participating  Broker-Dealer  in the Exchange
         Offer, notify the selling Holders of Transfer Restricted Securities, or
         each  such  Participating  Broker-Dealer,  as the  case  may be,  their
         counsel and the managing  underwriters,  if any,  promptly  (but in any
         event within one day),  and confirm such notice in writing,  (i) when a
         Prospectus or any Prospectus supplement or post-effective amendment has
         been  filed,  and,  with  respect to a  Registration  Statement  or any
         post-effective  amendment, when the same has become effective under the
         Securities Act  (including in such notice a written  statement that any
         Holder may, upon request,  obtain,  at the sole expense of the Issuers,
         one conformed  copy of such  Registration  Statement or  post-effective
         amendment  including  financial  statements  and  schedules,  documents
         incorporated  or deemed to be  incorporated by reference and exhibits),

                                       13


         (ii)  of the  issuance  by the SEC of any  stop  order  suspending  the
         effectiveness of a Registration Statement or of any order preventing or
         suspending the use of any  preliminary  prospectus or the initiation of
         any  proceedings  for  that  purpose,  (iii)  if at  any  time  when  a
         prospectus  is  required  by  the  Securities  Act to be  delivered  in
         connection with sales of the Transfer Restricted  Securities or resales
         of Exchange Notes by Participating  Broker-Dealers the  representations
         and  warranties  of any  of  the  Issuers  contained  in any  agreement
         (including any  underwriting  agreement)  contemplated  by Section 5(m)
         hereof cease to be true and correct in all material  respects,  (iv) of
         the receipt by any of the Issuers of any  notification  with respect to
         the suspension of the qualification or exemption from  qualification of
         a Registration  Statement or any of the Transfer Restricted  Securities
         or the Exchange Notes to be sold by any Participating Broker-Dealer for
         offer or sale in any jurisdiction,  or the initiation or threatening of
         any proceeding for such purpose, (v) of the happening of any event, the
         existence of any condition or any information becoming known that makes
         any statement made in such Registration Statement or related Prospectus
         or any document  incorporated or deemed to be  incorporated  therein by
         reference untrue in any material respect or that requires the making of
         any  changes  in or  amendments  or  supplements  to such  Registration
         Statement,  Prospectus  or  documents  so  that,  in  the  case  of the
         Registration  Statement,  it will not contain any untrue statement of a
         material  fact or omit to state any material fact required to be stated
         therein or necessary to make the statements therein not misleading, and
         that in the case of the  Prospectus,  it will not  contain  any  untrue
         statement  of a  material  fact or  omit to  state  any  material  fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein,  in light of the circumstances under which they were made, not
         misleading,  and  (vi)  of  any of the  Issuers'  determination  that a
         post-effective   amendment  to  a  Registration   Statement   would  be
         appropriate.

                  (d) If (1) a Shelf Registration is filed pursuant to Section 3
         hereof,   or  (2)  a  Prospectus   contained  in  the  Exchange   Offer
         Registration  Statement  filed pursuant to Section 2 hereof is required
         to  be  delivered  under  the  Securities  Act  by  any   Participating
         Broker-Dealer  who seeks to sell Exchange  Notes during the  Applicable
         Period,  use their  respective  best efforts to prevent the issuance of
         any order suspending the  effectiveness of a Registration  Statement or
         of any  order  preventing  or  suspending  the use of a  Prospectus  or
         suspending the qualification  (or exemption from  qualification) of any
         of the Transfer Restricted  Securities or the Exchange Notes to be sold
         by any Participating Broker-Dealer,  for sale in any jurisdiction, and,
         if any such order is issued,  to use their  respective  best efforts to
         obtain the withdrawal of any such order at the earliest possible date.

                                       14


                  (e) Subject to the  provisions of the last sentence of Section
         5(k),  if a Shelf  Registration  is filed  pursuant to Section 3 and if
         requested by the managing  underwriter  or  underwriters  (if any), the
         Holders of a majority in  aggregate  principal  amount of the  Transfer
         Restricted  Securities  being sold in connection  with an  underwritten
         offering  or  any   Participating   Broker-Dealer,   (i)   promptly  as
         practicable  incorporate in a prospectus  supplement or  post-effective
         amendment such information as the managing  underwriter or underwriters
         (if any), such Holders, any Participating  Broker-Dealer or counsel for
         any of them reasonably  request to be included  therein,  (ii) make all
         required filings of such prospectus  supplement or such  post-effective
         amendment  as soon as  practicable  after  either  Issuer has  received
         notification  of the  matters  to be  incorporated  in such  prospectus
         supplement or  post-effective  amendment,  and (iii) supplement or make
         amendments to such Registration Statement;  provided, however, that the
         Issuers  shall not be  required  to take any  action  pursuant  to this
         Section 5(e) that would violate applicable law.

                  (f) If (1) a Shelf Registration is filed pursuant to Section 3
         hereof,   or  (2)  a  Prospectus   contained  in  the  Exchange   Offer
         Registration  Statement  filed pursuant to Section 2 hereof is required
         to  be  delivered  under  the  Securities  Act  by  any   Participating
         Broker-Dealer  who seeks to sell Exchange  Notes during the  Applicable
         Period,   furnish  to  each  selling  Holder  of  Transfer   Restricted
         Securities and to each such Participating Broker-Dealer who so requests
         and to  counsel  and each  managing  underwriter,  if any,  at the sole
         expense  of  the  Issuers,  one  conformed  copy  of  the  Registration
         Statement or Registration Statements and each post-effective  amendment
         thereto,   including  financial  statements  and  schedules,   and,  if
         requested,  all  documents  incorporated  or deemed to be  incorporated
         therein by reference and all exhibits.

                  (g) If (1) a Shelf Registration is filed pursuant to Section 3
         hereof,   or  (2)  a  Prospectus   contained  in  the  Exchange   Offer
         Registration  Statement  filed pursuant to Section 2 hereof is required
         to  be  delivered  under  the  Securities  Act  by  any   Participating
         Broker-Dealer  who seeks to sell Exchange  Notes during the  Applicable
         Period,   deliver  to  each  selling  Holder  of  Transfer   Restricted
         Securities, or each such Participating  Broker-Dealer,  as the case may
         be, their respective counsel, and the underwriters, if any, at the sole
         expense  of  the  Issuers,   as  many  copies  of  the   Prospectus  or
         Prospectuses  (including each form of preliminary  prospectus) and each
         amendment  or  supplement  thereto and any  documents  incorporated  by
         reference therein as such Persons may reasonably request;  and, subject
         to the last  paragraph  of this  Section 5, each of the Issuers  hereby
         consents to the use of such Prospectus and each amendment or supplement
         thereto  by  each  of  the  selling  Holders  of  Transfer   Restricted
         Securities or each such  Participating  Broker-Dealer,  as the case may

                                       15


         be, and the  underwriters  or agents,  if any, and dealers (if any), in
         connection  with  the  offering  and  sale of the  Transfer  Restricted
         Securities  covered by, or the sale by Participating  Broker-Dealers of
         the Exchange  Notes  pursuant to, such  Prospectus and any amendment or
         supplement thereto.

                  (h)  Prior  to any  public  offering  of  Transfer  Restricted
         Securities  or any delivery of a  Prospectus  contained in the Exchange
         Offer  Registration  Statement by any  Participating  Broker-Dealer who
         seeks to sell Exchange Notes during the Applicable Period, to use their
         respective  best efforts to register or qualify,  and to cooperate with
         the selling  Holders of  Transfer  Restricted  Securities  or each such
         Participating   Broker-Dealer,   as  the  case  may  be,  the  managing
         underwriter or underwriters,  if any, and their  respective  counsel in
         connection with the  registration or  qualification  (or exemption from
         such  registration  or  qualification)  of  such  Transfer   Restricted
         Securities  for offer and sale under the securities or Blue Sky laws of
         such  jurisdictions  within the United  States as any  selling  Holder,
         Participating   Broker-Dealer,   or   the   managing   underwriter   or
         underwriters  reasonably request in writing;  provided,  however,  that
         where Exchange Notes held by Participating  Broker-Dealers  or Transfer
         Restricted  Securities  are offered other than through an  underwritten
         offering,  the Issuers agree to cause their counsel to perform Blue Sky
         investigations and file registrations and qualifications required to be
         filed  pursuant to this Section 5(h);  keep each such  registration  or
         qualification (or exemption therefrom) effective during the period such
         Registration  Statement is required to be kept effective and do any and
         all other acts or things  reasonably  necessary  or advisable to enable
         the  disposition  in such  jurisdictions  of the Exchange Notes held by
         Participating  Broker-Dealers  or the  Transfer  Restricted  Securities
         covered by the applicable  Registration Statement;  provided,  however,
         that none of the Issuers shall be required to (A) qualify  generally to
         do business in any jurisdiction where it is not then so qualified,  (B)
         take any action that would subject it to general  service of process in
         any such  jurisdiction  where it is not then so subject or (C)  subject
         itself to  taxation  in excess of a nominal  dollar  amount in any such
         jurisdiction where it is not then so subject.

                  (i) If a Shelf  Registration  is filed  pursuant  to Section 3
         hereof,  cooperate  with the  selling  Holders of  Transfer  Restricted
         Securities  and the managing  underwriter or  underwriters,  if any, to
         facilitate  the  timely   preparation   and  delivery  of  certificates
         representing   Transfer   Restricted   Securities  to  be  sold,  which
         certificates  shall not bear any restrictive  legends and shall be in a
         form eligible for deposit with The Depository Trust Company; and enable
         such Transfer  Restricted  Securities to be in such  denominations  and
         registered in such names as the managing  underwriter or  underwriters,
         if any, or Holders may request.

                                       16


                  (j) Use their  respective  best  efforts to cause the Transfer
         Restricted  Securities  covered  by the  Registration  Statement  to be
         registered  with or  approved  by such other  governmental  agencies or
         authorities  as may be  reasonably  necessary  to enable  the seller or
         sellers  thereof  or  the  underwriter  or  underwriters,  if  any,  to
         consummate  the  disposition  of such Transfer  Restricted  Securities,
         except as may be required solely as a consequence of the nature of such
         selling Holder's business,  in which case the Issuers will cooperate in
         all reasonable respects with the filing of such Registration  Statement
         and the granting of such approvals.

                  (k) If (1) a Shelf Registration is filed pursuant to Section 3
         hereof,   or  (2)  a  Prospectus   contained  in  the  Exchange   Offer
         Registration  Statement  filed pursuant to Section 2 hereof is required
         to  be  delivered  under  the  Securities  Act  by  any   Participating
         Broker-Dealer  who seeks to sell Exchange  Notes during the  Applicable
         Period,  upon the  occurrence  of any event  contemplated  by paragraph
         5(c)(v) or 5(c)(vi)  hereof,  as promptly  as  practicable  prepare and
         (subject to Section 5(a) hereof) file with the SEC, at the sole expense
         of  the  Issuers,  a  supplement  or  post-effective  amendment  to the
         Registration Statement or a supplement to the related Prospectus or any
         document   incorporated  or  deemed  to  be  incorporated   therein  by
         reference,  or file any other required  document so that, as thereafter
         delivered to the purchasers of the Transfer Restricted Securities being
         sold thereunder or to the purchasers of the Exchange Notes to whom such
         Prospectus will be delivered by a Participating Broker-Dealer, any such
         Prospectus  will not contain an untrue  statement of a material fact or
         omit to  state  a  material  fact  required  to be  stated  therein  or
         necessary to make the statements therein, in light of the circumstances
         under  which  they  were  made,  not  misleading.  Notwithstanding  the
         foregoing,  the Issuers  shall not be required to amend or supplement a
         Registration   Statement,   any  related  prospectus  or  any  document
         incorporated  therein by reference in the event that,  and for a period
         (a "Black Out Period") not to exceed,  for so long as this Agreement is
         in  effect,  an  aggregate  of 45 days if (x) an  event  occurs  and is
         continuing as a result of which a Registration  Statement,  any related
         prospectus  or any document  incorporated  therein by reference as then
         amended or  supplemented  would,  in the Issuers' good faith  judgment,
         contain  an  untrue  statement  of a  material  fact or omit to state a
         material fact necessary in order to make the statements therein, in the
         light of the circumstances  under which they were made, not misleading,
         and (y) (1) the Issuers  determine in good faith that the disclosure of
         such event at such time would  have a  material  adverse  effect on the
         business,  operations or prospects of the Issuers or (2) the disclosure
         otherwise relates to a material business  transaction which has not yet
         been publicly disclosed in any relevant jurisdiction.

                                       17


                  (l)  Prior to the  effective  date of the  first  Registration
         Statement relating to the Transfer Restricted  Securities,  (i) provide
         the Trustee with certificates for the Transfer Restricted Securities in
         a form eligible for deposit with The Depository  Trust Company and (ii)
         provide a CUSIP number for the Transfer Restricted Securities.

                  (m) In connection with any  underwritten  offering of Transfer
         Restricted  Securities pursuant to a Shelf Registration,  enter into an
         underwriting  agreement as is customary  in  underwritten  offerings of
         debt securities  similar to the Notes in form and substance  reasonably
         satisfactory  to the  Issuers  and take all such  other  actions as are
         reasonably  requested by the managing  underwriter or  underwriters  in
         order to expedite or facilitate the  registration or the disposition of
         such Transfer Restricted  Securities and, in such connection,  (i) make
         such  representations  and  warranties  to,  and  covenants  with,  the
         underwriters  with  respect to the  business  of the  Issuers and their
         respective subsidiaries (including any acquired business, properties or
         entity, if applicable) and the Registration  Statement,  Prospectus and
         documents,  if  any,  incorporated  or  deemed  to be  incorporated  by
         reference therein,  in each case, as are customarily made by issuers to
         underwriters  in underwritten  offerings of debt securities  similar to
         the Notes,  and  confirm the same in writing if and when  requested  in
         form and substance reasonably  satisfactory to the Issuers; (ii) obtain
         the written  opinions  of counsel to the  Issuers  and written  updates
         thereof in form,  scope and substance  reasonably  satisfactory  to the
         managing  underwriter or  underwriters,  addressed to the  underwriters
         covering  the  matters   customarily  covered  in  opinions  reasonably
         requested in  underwritten  offerings  and such other matters as may be
         reasonably requested by the managing underwriter or underwriters; (iii)
         use their best  efforts to obtain  "cold  comfort"  letters and updates
         thereof in form,  scope and substance  reasonably  satisfactory  to the
         managing  underwriter or underwriters  from the  independent  certified
         public  accountants  of the  Issuers  (and,  if  necessary,  any  other
         independent  certified  public  accountants of any subsidiary of any of
         the Issuers or of any business acquired by any of the Issuers for which
         financial  statements  and  financial  data are, or are required to be,
         included or incorporated by reference in the  Registration  Statement),
         addressed to each of the underwriters,  such letters to be in customary
         form and  covering  matters  of the type  customarily  covered in "cold
         comfort"  letters in  connection  with  underwritten  offerings of debt
         securities  similar to the Notes and such other  matters as  reasonably
         requested by the managing  underwriter or  underwriters as permitted by
         the Statement on Auditing Standards No. 72; and (iv) if an underwriting
         agreement  is  entered  into,  the same shall  contain  indemnification
         provisions  and  procedures  no  less  favorable  to  the  sellers  and
         underwriters, if any, than those set forth in Section 7 hereof (or such
         other provisions and procedures  acceptable to Holders of a majority in

                                       18


         aggregate principal amount of Transfer Restricted Securities covered by
         such   Registration   Statement   and  the  managing   underwriter   or
         underwriters  or  agents,  if  any).  The  above  shall be done at each
         closing  under  such  underwriting  agreement,  or as and to the extent
         required thereunder.

                  (n) If (1) a Shelf Registration is filed pursuant to Section 3
         hereof,   or  (2)  a  Prospectus   contained  in  the  Exchange   Offer
         Registration  Statement  filed pursuant to Section 2 hereof is required
         to  be  delivered  under  the  Securities  Act  by  any   Participating
         Broker-Dealer  who seeks to sell Exchange  Notes during the  Applicable
         Period,  make  available for  inspection by any selling  Holder of such
         Transfer  Restricted  Securities being sold, or each such Participating
         Broker-Dealer, as the case may be, any underwriter participating in any
         such  disposition of Transfer  Restricted  Securities,  if any, and any
         attorney, accountant or other agent retained by any such selling Holder
         or each  such  Participating  Broker-Dealer,  as the  case  may be,  or
         underwriter  (collectively,  the  "Inspectors"),  at the offices  where
         normally kept,  during  reasonable  business  hours,  all financial and
         other records,  pertinent  corporate  documents and  instruments of the
         Issuers and their respective subsidiaries (collectively, the "Records")
         as shall  be  reasonably  necessary  to  enable  them to  exercise  any
         applicable  due  diligence  responsibilities,  and cause the  officers,
         directors   and   employees   of  the  Issuers  and  their   respective
         subsidiaries to supply all information reasonably requested by any such
         Inspector  in   connection   with  such   Registration   Statement  and
         Prospectus. Each Inspector shall agree in writing that it will keep the
         Records  confidential  and that it will not disclose any of the Records
         unless (i) the  disclosure  of such  Records is  necessary  to avoid or
         correct a misstatement  or omission in such  Registration  Statement or
         Prospectus,  (ii) the release of such Records is ordered  pursuant to a
         subpoena or other order from a court of competent  jurisdiction,  (iii)
         disclosure  of such  information  is  necessary  or  advisable,  in the
         opinion of counsel for any  Inspector,  in connection  with any action,
         claim,  suit  or  proceeding,  directly  or  indirectly,  involving  or
         potentially  involving  such  Inspector and arising out of, based upon,
         relating to, or involving this Agreement or the Purchase Agreement,  or
         any transactions contemplated hereby or thereby or arising hereunder or
         thereunder,  or (iv) the  information  in such  Records  has been  made
         generally available to the public; provided, however, that prior notice
         shall  be  provided  as  soon  as  practicable  to the  Issuers  of the
         potential  disclosure of any information by such Inspector  pursuant to
         clauses (ii) or (iii) of this  sentence to permit the Issuers to obtain
         a protective  order (or waive the provisions of this paragraph (n)) and
         that such Inspector shall take such actions as are reasonably necessary
         to protect the  confidentiality of such information (if practicable) to
         the  extent  such  action  is  otherwise  not  inconsistent   with,  an

                                       19


         impairment  of or in  derogation  of the  rights and  interests  of the
         Holder  or  any  Inspector.   Each  selling  Holder  of  such  Transfer
         Restricted Securities and each such Participating Broker-Dealer will be
         required to agree that  information  obtained by it as a result of such
         inspections shall be deemed confidential and shall not be used by it as
         the basis for any market  transactions in the securities of the Issuers
         unless and until such is made generally  available to the public.  Each
         selling  Holder of such Transfer  Restricted  Securities  and each such
         Participating  Broker-Dealer  will be required to further agree that it
         will,  upon  learning  that  disclosure  of such Records is sought in a
         court of competent  jurisdiction,  give notice to the Issuers and allow
         the Issuers to undertake  appropriate  action to prevent  disclosure of
         the Records deemed confidential at the Issuers' expense.

                  (o) Provide an indenture  trustee for the Transfer  Restricted
         Securities  or the  Exchange  Notes,  as the case may be, and cause the
         Indenture or the trust  indenture  provided for in Section 2(a) hereof,
         as the case may be, to be  qualified  under the TIA not later  than the
         effective  date of the first  Registration  Statement  relating  to the
         Transfer Restricted Securities; and in connection therewith,  cooperate
         with the  trustee  under  any such  indenture  and the  Holders  of the
         Transfer  Restricted  Securities,   to  effect  such  changes  to  such
         indenture as may be required  for such  indenture to be so qualified in
         accordance  with the  terms  of the TIA;  and  execute,  and use  their
         respective best efforts to cause such trustee to execute, all documents
         as may be  required  to effect  such  changes,  and all other forms and
         documents required to be filed with the SEC to enable such indenture to
         be so qualified in a timely manner.

                  (p) Comply with all  applicable  rules and  regulations of the
         SEC and make generally  available to their  respective  securityholders
         earnings  statements  satisfying the provisions of Section 11(a) of the
         Securities Act and Rule 158 thereunder (or any similar rule promulgated
         under the  Securities  Act) no later  than 45 days after the end of any
         12-month  period  (or 90 days after the end of any  12-month  period if
         such period is a fiscal year) (i)  commencing  at the end of any fiscal
         quarter  in  which   Transfer   Restricted   Securities   are  sold  to
         underwriters in a firm commitment or best efforts underwritten offering
         and (ii) if not sold to underwriters in such an offering, commencing on
         the first day of the first  fiscal  quarter  of the  Issuers  after the
         effective  date of a Registration  Statement,  which  statements  shall
         cover said 12-month periods.

                  (q) Upon  consummation  of the  Exchange  Offer  or a  Private
         Exchange,  obtain an  opinion  of  counsel  to the  Issuers,  in a form
         customary for underwritten  transactions,  addressed to the Trustee for
         the  benefit  of  all  Holders  of   Transfer   Restricted   Securities
         participating  in the Exchange  Offer or the Private  Exchange,  as the

                                       20


         case may be, that the Exchange Notes or Private  Exchange Notes, as the
         case may be, and the  related  indenture  constitute  legal,  valid and
         binding obligations of the Issuers,  enforceable against the Issuers in
         accordance with its respective terms,  subject to customary  exceptions
         and qualifications.

                  (r) If the  Exchange  Offer  or a  Private  Exchange  is to be
         consummated,  upon  delivery of the Transfer  Restricted  Securities by
         Holders to the  Issuers  (or to such other  Person as  directed  by the
         Issuers) in exchange  for the  Exchange  Notes or the Private  Exchange
         Notes,  as the case may be,  the  Issuers  shall  mark,  or cause to be
         marked,  on such  Transfer  Restricted  Securities  that such  Transfer
         Restricted  Securities are being cancelled in exchange for the Exchange
         Notes or the Private  Exchange  Notes,  as the case may be; in no event
         shall  such  Transfer  Restricted  Securities  be  marked  as  paid  or
         otherwise satisfied.

                  (s)  Cooperate   with  each  seller  of  Transfer   Restricted
         Securities covered by any Registration  Statement and each underwriter,
         if any,  participating  in the disposition of such Transfer  Restricted
         Securities and their respective  counsel in connection with any filings
         required  to be  made  with  the  National  Association  of  Securities
         Dealers, Inc. (the "NASD").

                  (t) Use their  respective best efforts to take all other steps
         reasonably  necessary to effect the  registration of the Exchange Notes
         and/or  Transfer  Restricted   Securities  covered  by  a  Registration
         Statement contemplated hereby.

                  The  Issuers may  require  each seller of Transfer  Restricted
Securities  as to which any  registration  is being  effected  to furnish to the
Issuers such  information  regarding  such seller and the  distribution  of such
Transfer Restricted Securities as the Issuers may, from time to time, reasonably
request.  The Issuers may exclude from such registration the Transfer Restricted
Securities  of any  seller  so  long  as  such  seller  fails  to  furnish  such
information  within a reasonable time after receiving such request.  Each seller
as to which any Shelf  Registration is being effected agrees to furnish promptly
to the Issuers all  information  required to be  disclosed  in order to make the
information  previously  furnished to the Issuers by such seller not  materially
misleading.

                  If any such  Registration  Statement  refers to any  Holder by
name or otherwise  as the holder of any  securities  of the  Issuers,  then such
Holder shall have the right to require (i) the insertion therein of language, in
form and substance  reasonably  satisfactory to such Holder,  to the effect that
the  holding  by such  Holder of such  securities  is not to be  construed  as a
recommendation  by such  Holder  of the  investment  quality  of the  securities
covered  thereby  and that such  holding  does not imply that such  Holder  will
assist in meeting any future  financial  requirements of any of the Issuers,  or
(ii) in the event that such reference to such Holder by name or otherwise is not
required by the Securities Act or any similar federal statute then in force, the

                                       21


deletion of the  reference to such Holder in any  amendment or supplement to the
Registration  Statement  filed or  prepared  subsequent  to the time  that  such
reference ceases to be required.

                  Each  Holder  of  Transfer  Restricted   Securities  and  each
Participating   Broker-Dealer   agrees  by  its  acquisition  of  such  Transfer
Restricted  Securities  or  Exchange  Notes  to be sold  by  such  Participating
Broker-Dealer,  as the case may be, that, upon actual receipt of any notice from
the  Issuers  of the  happening  of any event of the kind  described  in Section
5(c)(ii),  5(c)(iv),  5(c)(v),  or 5(c)(vi)  hereof,  such Holder will forthwith
discontinue  disposition of such Transfer Restricted  Securities covered by such
Registration Statement or Prospectus or Exchange Notes to be sold by such Holder
or  Participating  Broker-Dealer,  as the case may be,  until such  Holder's  or
Participating  Broker-Dealer's  receipt  of the  copies of the  supplemented  or
amended  Prospectus  contemplated by Section 5(k) hereof, or until it is advised
in writing (the  "Advice") by any of the Issuers that the use of the  applicable
Prospectus  may be  resumed,  and  has  received  copies  of any  amendments  or
supplements  thereto.  In the event that the Issuers shall give any such notice,
each of the Effectiveness  Period and the Applicable Period shall be extended by
the number of days during such periods from and including the date of the giving
of such notice to and including the date when each seller of Transfer Restricted
Securities  covered by such Registration  Statement or Exchange Notes to be sold
by such Participating Broker-Dealer, as the case may be, shall have received (x)
the copies of the  supplemented  or amended  Prospectus  contemplated by Section
5(k) hereof or (y) the Advice.

6.       Registration Expenses

                  All  fees  and  expenses  incident  to the  performance  of or
compliance  with this  Agreement  by the Issuers  shall be borne by the Issuers,
jointly and severally,  whether or not the Exchange Offer Registration Statement
or any Shelf Registration is filed or becomes effective or the Exchange Offer is
consummated, including, without limitation, (i) all registration and filing fees
(including,  without limitation, (A) fees with respect to filings required to be
made with the NASD in connection with an underwritten  offering and (B) fees and
expenses  of  compliance  with  state  securities  or Blue Sky laws  (including,
without  limitation,  reasonable fees and disbursements of counsel in connection
with Blue Sky qualifications of the Transfer  Restricted  Securities or Exchange
Notes and determination of the eligibility of the Transfer Restricted Securities
or Exchange Notes for investment under the laws of such  jurisdictions (x) where
the holders of Transfer  Restricted  Securities are located,  in the case of the
Exchange  Notes,  or (y) as  provided  in Section  5(h)  hereof,  in the case of
Transfer  Restricted  Securities or Exchange Notes to be sold by a Participating
Broker-Dealer during the Applicable Period)), (ii) printing expenses, including,
without  limitation,  expenses of printing  certificates for Transfer Restricted
Securities or Exchange  Notes in a form eligible for deposit with The Depository
Trust Company and of printing  prospectuses  if the printing of  prospectuses is

                                       22


requested by the managing underwriter or underwriters, if any, by the Holders of
a majority in aggregate principal amount of the Transfer  Restricted  Securities
included in any  Registration  Statement  or in respect of  Transfer  Restricted
Securities  or  Exchange  Notes  to be sold by any  Participating  Broker-Dealer
during the Applicable Period, as the case may be, (iii) messenger, telephone and
delivery  expenses,  (iv) fees and  disbursements of counsel for the Issuers and
reasonable fees and  disbursements of one special counsel for all of the sellers
of Transfer Restricted Securities (exclusive of any counsel retained pursuant to
Section 7  hereof),  (v) fees and  disbursements  of all  independent  certified
public accountants  referred to in Section 5(m)(iii) hereof (including,  without
limitation,  the  expenses  of any  special  audit  and "cold  comfort"  letters
required by or incident to such  performance),  (vi)  Securities  Act  liability
insurance, if the Issuers desire such insurance,  (vii) fees and expenses of all
other Persons  retained by any of the Issuers,  (viii) internal  expenses of the
Issuers (including,  without  limitation,  all salaries and expenses of officers
and employees of all of the Issuers performing legal or accounting duties), (ix)
the  expense  of any  annual  audit,  (x) the  fees  and  expenses  incurred  in
connection with the listing of the securities to be registered on any securities
exchange,  and the  obtaining of a rating of the  securities,  in each case,  if
applicable,  and (xi) the expenses  relating to printing,  word  processing  and
distributing all Registration Statements,  underwriting  agreements,  indentures
and any other documents necessary in order to comply with this Agreement.

7.       Indemnification

                  (a) The Issuers and any Subsidiary  Guarantors agree,  jointly
and severally, to indemnify and hold harmless each Holder of Transfer Restricted
Securities and each  Participating  Broker-Dealer  selling Exchange Notes during
the Applicable  Period,  the officers,  directors,  employees and agents of each
such Person,  and each Person,  if any, who controls any such Person  within the
meaning of either Section 15 of the Securities Act or Section 20 of the Exchange
Act (each,  a  "Participant"),  from and  against  any and all  losses,  claims,
damages, judgments, liabilities and expenses (including, without limitation, the
reasonable  legal fees and other expenses  actually  incurred in connection with
any suit,  action or proceeding or any claim asserted) caused by, arising out of
or based upon any untrue  statement  or alleged  untrue  statement of a material
fact  contained in any  Registration  Statement  (or any  amendment  thereto) or
Prospectus  (as  amended  or  supplemented  if  any of the  Issuers  shall  have
furnished any amendments or supplements thereto) or any preliminary  prospectus,
or caused by,  arising out of or based upon any omission or alleged  omission to
state therein a material fact required to be stated therein or necessary to make
the  statements  therein,  in  the  case  of  the  Prospectus  in  light  of the
circumstances under which they were made, not misleading, except insofar as such
losses,  claims,  damages or liabilities  are caused by any untrue  statement or
omission or alleged  untrue  statement or omission  made in reliance upon and in
conformity with information relating to any Participant furnished to the Issuers
in writing by such  Participant  expressly for use therein;  provided,  however,

                                       23


that the  Issuers  will not be liable if such  untrue  statement  or omission or
alleged  untrue  statement or omission was contained or made in any  preliminary
prospectus and corrected in the final  Prospectus or any amendment or supplement
thereto and any such loss,  liability,  claim, or damage or expense  suffered or
incurred by the  Participants  resulted  from any  action,  claim or suit by any
Person who purchased Transfer Restricted  Securities or Exchange Notes which are
the subject  thereof from such  Participant and it is established in the related
proceeding  that such  Participant  failed to  deliver  or provide a copy of the
final  Prospectus (as amended or  supplemented)  to such Person with or prior to
the confirmation of the sale of such Transfer Restricted  Securities or Exchange
Notes sold to such Person if required by applicable law.

                  (b) Each  Participant  agrees,  severally and not jointly,  to
indemnify  and hold harmless each of the Issuers,  their  respective  directors,
their respective  officers who sign the  Registration  Statement and each Person
who controls each Issuer within the meaning of Section 15 of the  Securities Act
or Section 20 of the Exchange Act to the same extent (but on a several,  and not
joint,  basis) as the foregoing  indemnity from the Issuers to each Participant,
but only with reference to information relating to such Participant furnished to
the Issuers in writing by such Participant expressly for use in any Registration
Statement or Prospectus, any amendment or supplement thereto, or any preliminary
prospectus.  The liability of any  Participant  under this paragraph shall in no
event exceed the proceeds  received by such  Participant  from sales of Transfer
Restricted Securities or Exchange Notes giving rise to such obligations.

                  (c)  If  any   suit,   action,   proceeding   (including   any
governmental or regulatory  investigation),  claim or demand shall be brought or
asserted against any Person in respect of which indemnity may be sought pursuant
to  either  of the two  preceding  paragraphs,  such  Person  (the  "Indemnified
Person")  shall promptly  notify the Persons  against whom such indemnity may be
sought (the "Indemnifying  Persons") in writing,  and the Indemnifying  Persons,
upon  request  of  the  Indemnified  Person,  shall  retain  counsel  reasonably
satisfactory to the Indemnified  Person to represent the Indemnified  Person and
any others the Indemnifying  Persons may reasonably designate in such proceeding
and shall pay the fees and expenses actually incurred by such counsel related to
such  proceeding;   provided,  however,  that  the  failure  to  so  notify  the
Indemnifying  Persons  shall  not  relieve  any of  them  of any  obligation  or
liability  which  any of them  may  have  hereunder  or  otherwise.  In any such
proceeding,  any  Indemnified  Person  shall  have the right to  retain  its own
counsel,  but the fees and expenses of such  counsel  shall be at the expense of
such Indemnified Person unless (i) the Indemnifying  Persons and the Indemnified
Person shall have mutually agreed to the contrary, (ii) the Indemnifying Persons
shall  have  failed  within  a  reasonable  period  of  time to  retain  counsel
reasonably  satisfactory to the Indemnified Person or (iii) the named parties in
any  such  proceeding   (including  any  impleaded  parties)  include  both  any

                                       24


Indemnifying  Person and the  Indemnified  Person or any  affiliate  thereof and
representation of both parties by the same counsel would be inappropriate due to
actual or potential  differing  interests  between them. It is understood  that,
unless there  exists a conflict  among  Indemnified  Persons,  the  Indemnifying
Persons  shall  not,  in  connection   with  such  proceeding  or  separate  but
substantially similar related proceeding in the same jurisdiction arising out of
the same general  allegations,  be liable for the fees and expenses of more than
one  separate  firm (in  addition  to any  local  counsel)  for all  Indemnified
Persons,  and that all such fees and expenses  shall be  reimbursed  promptly as
they are incurred.  Any such separate firm for the Participants and such control
Persons of Participants  shall be designated in writing by Participants who sold
a majority in interest of Transfer Restricted Securities and Exchange Notes sold
by all such  Participants and shall be reasonably  acceptable to the Issuers and
any such  separate  firm for the  Issuers,  their  respective  directors,  their
respective  officers and such control Persons of the Issuers shall be designated
in writing by the Issuers and shall be reasonably acceptable to the Holders.

                  The   Indemnifying   Persons  shall  not  be  liable  for  any
settlement of any proceeding  effected  without its prior written consent (which
consent shall not be unreasonably withheld or delayed), but if settled with such
consent or if there be a final  non-appealable  judgment for the  plaintiff  for
which the  Indemnified  Person is entitled to  indemnification  pursuant to this
Agreement,  each of the  Indemnifying  Persons  agrees  to  indemnify  and  hold
harmless  each  Indemnified  Person from and against  any loss or  liability  by
reason of such settlement or judgment. No Indemnifying Person shall, without the
prior written  consent of the  Indemnified  Persons  (which consent shall not be
unreasonably  withheld or delayed),  effect any  settlement or compromise of any
pending or threatened  proceeding in respect of which any Indemnified  Person is
or could have been a party,  or  indemnity  could have been sought  hereunder by
such  Indemnified  Person,  unless such settlement (A) includes an unconditional
written release of such  Indemnified  Person,  in form and substance  reasonably
satisfactory to such Indemnified  Person,  from all liability on claims that are
the subject matter of such  proceeding and (B) does not include any statement as
to an admission of fault,  culpability or failure to act by or on behalf of such
Indemnified Person.

                  (d) If the  indemnification  provided  for  in the  first  and
second  paragraphs  of this  Section  7 is for any  reason  unavailable  to,  or
insufficient to hold harmless,  an Indemnified  Person in respect of any losses,
claims,  damages or  liabilities  referred  to therein,  then each  Indemnifying
Person under such paragraphs,  in lieu of indemnifying  such Indemnified  Person
thereunder  and in order to provide for just and equitable  contribution,  shall
contribute to the amount paid or payable by such Indemnified  Person as a result
of  such  losses,  claims,  damages  or  liabilities  in such  proportion  as is
appropriate to reflect (i) the relative  benefits  received by the  Indemnifying
Person or Persons on the one hand and the  Indemnified  Person or Persons on the
other from the offering of the Notes or (ii) if the  allocation  provided by the
foregoing  clause (i) is not permitted by applicable law, not only such relative

                                       25


benefits but also the relative  fault of the  Indemnifying  Person or Persons on
the one hand and the  Indemnified  Person or Persons on the other in  connection
with the  statements  or  omissions  or alleged  statements  or  omissions  that
resulted in such losses,  claims,  damages or liabilities (or actions in respect
thereof) as well as any other relevant  equitable  considerations.  The relative
benefits  received  by the Issuers on the one hand and the  Participants  on the
other shall be deemed to be in the same  proportion  as the total  proceeds from
the offering (net of discounts and commissions but before deducting expenses) of
the Notes received by the Issuers bears to the total  proceeds  received by such
Participant from the sale of Transfer  Restricted  Securities or Exchange Notes,
as the case may be, in each case as set forth in the table on the cover  page of
the Offering  Memorandum in respect of the sale of the Notes. The relative fault
of the parties shall be determined by reference to, among other things,  whether
the untrue or alleged  untrue  statement  of a material  fact or the omission or
alleged omission to state a material fact relates to information supplied by the
Issuers on the one hand or such Participant or such other Indemified  Person, as
the case may be, on the other, the parties' relative intent,  knowledge,  access
to information and opportunity to correct or prevent such statement or omission,
and any other equitable considerations appropriate in the circumstances.

                  (e) The parties  agree that it would not be just and equitable
if  contribution  pursuant  to  this  Section  7 were  determined  by  pro  rata
allocation  (even  if the  Participants  were  treated  as one  entity  for such
purpose) or by any other method of allocation  that does not take account of the
equitable considerations referred to in the immediately preceding paragraph. The
amount  paid or  payable  by an  Indemnified  Person as a result of the  losses,
claims,  damages,  judgments,  liabilities  and  expenses  referred  to  in  the
immediately  preceding  paragraph  shall be deemed to  include,  subject  to the
limitations  set forth above,  any reasonable  legal or other expenses  actually
incurred  by  such  Indemnified  Person  in  connection  with  investigating  or
defending  any such  action or claim.  Notwithstanding  the  provisions  of this
Section 7, in no event shall a Participant  be required to contribute any amount
in excess of the amount by which  proceeds  received  by such  Participant  from
sales of Transfer  Restricted  Securities or Exchange Notes, as the case may be,
exceeds the amount of any  damages  that such  Participant  has  otherwise  been
required to pay or has paid by reason of such untrue or alleged untrue statement
or   omission   or   alleged   omission.   No  Person   guilty   of   fraudulent
misrepresentation  (within the meaning of Section 11(f) of the  Securities  Act)
shall be  entitled  to  contribution  from any Person who was not guilty of such
fraudulent misrepresentation.

                  (f) Any losses, claims,  damages,  liabilities or expenses for
which an indemnified party is entitled to  indemnification or contribution under
this Section 7 shall be paid by the Indemnifying  Party to the Indemnified Party
as such losses,  claims,  damages,  liabilities  or expenses are  incurred.  The

                                       26


indemnity  and  contribution  agreements  contained  in this  Section  7 and the
representations  and warranties of the Issuers set forth in this Agreement shall
remain  operative  and  in  full  force  and  effect,   regardless  of  (i)  any
investigation  made by or on behalf of any Holder or any  person who  controls a
Holder, any Issuer, their respective directors, officers, employees or agents or
any person controlling any Issuer, and (ii) any termination of this Agreement.

                  (g) The indemnity  and  contribution  agreements  contained in
this  Section 7 will be in  addition  to any  liability  which the  Indemnifying
Persons may otherwise have to the Indemnified Persons referred to above.

8.       Rules 144 and 144A

                  The Issuers covenant and agree that each of them will file the
reports  required to be filed by each of them under the  Securities  Act and the
Exchange Act and the rules and  regulations  adopted by the SEC  thereunder in a
timely manner in accordance with the  requirements of the Securities Act and the
Exchange Act and, if at any time any of the Issuers is not required to file such
reports, such Issuer will, upon the request of any Holder or beneficial owner of
Transfer  Restricted  Securities,  make available such information  necessary to
permit sales pursuant to Rule 144A under the Securities Act. The Issuers further
covenant and agree,  for so long as any Transfer  Restricted  Securities  remain
outstanding  that each of them will take such  further  action as any  Holder of
Transfer  Restricted  Securities  may  reasonably  request,  all to  the  extent
required  from time to time to enable  such holder to sell  Transfer  Restricted
Securities  without  registration under the Securities Act within the limitation
of the exemptions provided by (a) Rule 144(k) and Rule 144A under the Securities
Act, as such Rules may be amended from time to time,  or (b) any similar rule or
regulation hereafter adopted by the SEC.

 9.      Underwritten Registrations

                  If any of the Transfer  Restricted  Securities  covered by any
Shelf  Registration are to be sold in an underwritten  offering,  the investment
banker or  investment  bankers  and  manager or  managers  that will  manage the
offering  will be selected by the Holders of a majority in  aggregate  principal
amount of such  Transfer  Restricted  Securities  included in such  offering and
shall be reasonably acceptable to the Issuers.

                  No Holder of Transfer Restricted Securities may participate in
any  underwritten  registration  hereunder unless such Holder (a) agrees to sell
such  Holder's  Transfer  Restricted  Securities  on the basis  provided  in any
underwriting  arrangements approved by the Persons entitled hereunder to approve
such arrangements and (b) completes and executes all  questionnaires,  powers of
attorney,  indemnities,  underwriting  agreements and other  documents  required
under the terms of such underwriting arrangements.

                                       27


10.      Miscellaneous

                  (a) No Inconsistent Agreements. None of the Issuers has, as of
the  date  hereof,  and  none  of the  Issuers  shall,  after  the  date of this
Agreement,  enter into any agreement with respect to any of its securities  that
is  inconsistent  with the rights granted to the Holders of Transfer  Restricted
Securities in this Agreement or otherwise  conflicts with the provisions hereof.
The rights granted to the Holders  hereunder do not in any way conflict with and
are not  inconsistent  with the  rights  granted  to the  holders  of any of the
Issuers'  other issued and  outstanding  securities  under any such  agreements.
Except as otherwise disclosed to the Initial Purchaser,  none of the Issuers has
entered  and none will  enter  into any  agreement  with  respect  to any of its
securities which will grant to any Person  piggy-back  registration  rights with
respect to any Registration Statement.

                  (b) Adjustments Affecting Transfer Restricted Securities. None
of the Issuers shall,  directly or  indirectly,  take any action with respect to
the Transfer  Restricted  Securities as a class that would adversely  affect the
ability of the  Holders  of  Transfer  Restricted  Securities  to  include  such
Transfer  Restricted  Securities in a registration  undertaken  pursuant to this
Agreement.

                  (c) Amendments  and Waivers.  The provisions of this Agreement
may not be  amended,  modified  or  supplemented,  and  waivers or  consents  to
departures from the provisions hereof may not be given,  otherwise than with the
prior written consent of (I) the Issuers and the Subsidiary Guarantors,  if any,
and  (II)(A)  the  Holders of not less than a majority  in  aggregate  principal
amount  of the  then  outstanding  Transfer  Restricted  Securities  and  (B) in
circumstances that would adversely affect the Participating Broker-Dealers,  the
Participating  Broker-Dealers  holding  not less than a  majority  in  aggregate
principal amount of the Exchange Notes held by all Participating Broker-Dealers;
provided,  however,  that Section 7 and this  Section  10(c) may not be amended,
modified or  supplemented  without the prior written  consent of each Holder and
each  Participating  Broker-Dealer  (including  any  person  who was a Holder or
Participating Broker-Dealer of Transfer Restricted Securities or Exchange Notes,
as the case may be, disposed of pursuant to any Registration Statement) affected
by  any  such  amendment,   modification  or  supplement.   Notwithstanding  the
foregoing, a waiver or consent to depart from the provisions hereof with respect
to a matter  that  relates  exclusively  to the rights of  Holders  of  Transfer
Restricted Securities whose securities are being sold pursuant to a Registration
Statement  and that does not directly or  indirectly  affect,  impair,  limit or
compromise the rights of other Holders of Transfer Restricted  Securities may be
given by Holders of at least a majority  in  aggregate  principal  amount of the
Transfer  Restricted   Securities  being  sold  pursuant  to  such  Registration
Statement.

                                       28


                  (d) Notices. All notices and other communications  (including,
without limitation, any notices or other communications to the Trustee) provided
for or permitted hereunder shall be made in writing by hand-delivery, registered
first-class mail, next-day air courier or facsimile:

                    (i) if to a Holder of the Transfer Restricted  Securities or
         any  Participating  Broker-Dealer,  at the most current address of such
         Holder or Participating Broker-Dealer, as the case may be, set forth on
         the records of the registrar under the Indenture.



                                       29




                   (ii) if to either  of the  Issuers  or any of the  Subsidiary
         Guarantors, at the address as follows:

                           c/o Abraxas Petroleum Corporation
                           500 N. Loop 1604 East
                           Suite 100
                           San Antonio, Texas
                           Facsimile No.: (210) 490-8816
                           Attention: Chief Executive Officer

                  All such  notices and  communications  shall be deemed to have
been duly given: when delivered by hand, if personally delivered;  five business
days after being deposited in the mail, postage prepaid, if mailed; one business
day after being timely delivered to a next-day air courier;  and when receipt is
acknowledged by the addressee, if sent by facsimile.

                  Copies of all such  notices,  demands or other  communications
shall be concurrently  delivered by the Person giving the same to the Trustee at
the address and in the manner specified in such Indenture.

                  (e) Successors and Assigns.  This Agreement shall inure to the
benefit of and be binding upon the successors and assigns of each of the parties
hereto, the Holders and the Participating Broker-Dealers.

                  (f)  Release  of  Subsidiary  Guarantors.  If  any  Subsidiary
Guarantor  becomes a party to this Agreement and is  subsequently  released from
its  obligations  under the Indenture in accordance  with the terms thereof then
such Subsidiary Guarantor shall be released from its obligations hereunder.

                  (g) Counterparts. This Agreement may be executed in any number
of  counterparts  and by the parties  hereto in separate  counterparts,  each of
which when so executed  shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

                  (h)  Headings.   The  headings  in  this   Agreement  are  for
convenience  of  reference  only and  shall not limit or  otherwise  affect  the
meaning hereof.

                  (i)  Governing  Law. THIS  AGREEMENT  SHALL BE GOVERNED BY AND
CONSTRUED IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF NEW YORK,  AS APPLIED TO
CONTRACTS  MADE AND  PERFORMED  ENTIRELY  WITHIN THE STATE OF NEW YORK,  WITHOUT
REGARD TO PRINCIPLES OF CONFLICTS OF LAW.

                  (j)  Severability.   If  any  term,  provision,   covenant  or
restriction of this Agreement is held by a court of competent jurisdiction to be

                                       30


invalid, illegal, void or unenforceable, the remainder of the terms, provisions,
covenants  and  restrictions  set forth  herein  shall  remain in full force and
effect and shall in no way be affected, impaired or invalidated, and the parties
hereto shall use their best efforts to find and employ an  alternative  means to
achieve the same or substantially  the same result as that  contemplated by such
term, provision,  covenant or restriction.  It is hereby stipulated and declared
to be the  intention of the parties that they would have  executed the remaining
terms, provisions, covenants and restrictions without including any of such that
may be hereafter declared invalid, illegal, void or unenforceable.

                  (k)  Securities  Held  by the  Issuers  or  Their  Affiliates.
Whenever  the  consent  or  approval  of Holders of a  specified  percentage  of
Transfer  Restricted  Securities  is  required  hereunder,  Transfer  Restricted
Securities  held  by any of  the  Issuers  or  any  of  their  their  respective
affiliates (as such term is defined in Rule 405 under the Securities  Act) shall
not be counted in determining  whether such consent or approval was given by the
Holders of such required percentage.

                  (l) Third Party Beneficiaries.  Holders of Transfer Restricted
Securities   and   Participating   Broker-Dealers   are  intended   third  party
beneficiaries  of this  Agreement,  and this  Agreement  may be enforced by such
Persons.

                  (m)  Entire  Agreement.  This  Agreement,  together  with  the
Purchase Agreement and the Indenture,  is intended by the parties as a final and
exclusive  statement of the agreement and understanding of the parties hereto in
respect of the subject matter contained herein and therein and any and all prior
oral  or  written  agreements,   representations,   or  warranties,   contracts,
understandings,  correspondence, conversations and memoranda between the Holders
on the one hand and the  Issuers on the other,  or between or among any  agents,
representatives,  parents, subsidiaries, affiliates, predecessors in interest or
successors in interest with respect to the subject matter hereof and thereof are
merged herein and replaced hereby.

                  n. Information Supplied by the Participant. The statements set
forth in the last  paragraph on the front cover page,  the  paragraph  regarding
stabilization  on page ii, the second  sentence  on page 4 opposite  the caption
"Exchange Offer; Registration Rights" and in the third and fourth paragraphs and
the fourth,  fifth, sixth and seventh sentences of the fifth paragraph under the
heading  "Plan of  Distribution"  in the Final  Memorandum  (to the extent  such
statements relate to the Participant)  constitute the only information furnished
by the Participant to the Issuers for the purposes of Section 7 hereof.

                  (o)  Subsidiary  Guarantor  a  Party.   Immediately  upon  the
designation  of any  Subsidiary of either Issuer as a Restricted  Subsidiary (as
defined in the  Indenture),  the Issuers shall cause such Subsidiary to become a

                                       31


party  hereto as a  Subsidiary  Guarantor by  executing  and  delivering  to the
Initial Purchaser a counterpart hereof.

                  IN WITNESS  WHEREOF,  the parties have executed this Agreement
as of the date first written above.



ABRAXAS PETROLEUM CORPORATION


By:/s/ CHRIS E. WILLIFORD
Name: Chris E. Williford
Title: Executive Vice President, Chief
       Financial Officer and Treasurer

CANADIAN ABRAXAS PETROLEUM LIMITED


By:/s/ CHRIS E. WILLIFORD
Name: Chris E. Williford
Title: Vice President


JEFFERIES & COMPANY, INC.,
         as Initial Purchaser


By: /s/ ROBERT CARINGTON
Name: Robert Carington
Title: Senior Vice President


                                       32




                  Each of the  undersigned  by its  execution  hereof  agrees to
become a party to this Agreement as a Subsidiary  Guarantor as of the date first
above written:

                                         By:___________________________
                                         Name:
                                         Title:


                                       33


                                                              EXHIBIT 10.3
                      AMENDED AND RESTATED CREDIT AGREEMENT


                  This Second Amendment to Amended and Restated Credit Agreement
(this  "Amendment")  dated as of January  23,  1998 is among  ABRAXAS  PETROLEUM
CORPORATION,  a Nevada  corporation  (the  "Borrower"),  the banks  named on the
signature pages hereto (together with their respective successors and assigns in
such  capacity,  the  "Banks"),  BANKERS TRUST  COMPANY,  as agent for the Banks
(together with its successors and assigns in such capacity, the "Agent") and ING
(U.S.)  CAPITAL  CORPORATION,  as  co-agent  for the  Banks  (together  with its
successors and assigns in such capacity, the "Co-Agent").


                              PRELIMINARY STATEMENT

                  A. The  Borrower  and the Bank  Group have  entered  into that
certain Amended and Restated Credit  Agreement dated as of November 14, 1996, as
amended by that certain First Amendment to Amended and Restated Credit Agreement
dated as of October 14, 1997 (as so amended, the "Credit Agreement").

                  B. The Borrower and the Bank Group desire to further amend the
Credit Agreement as set forth herein.


                  NOW  THEREFORE,  in  consideration  of the  foregoing  and the
mutual agreements set forth herein, the parties agree as follows:

                  Section  1.  Definitions.  Unless  otherwise  defined  in this
Amendment, each capitalized term used in this Amendment has the meaning assigned
to such term in the Credit Agreement.

                  Section 2. Amendments.  The Credit Agreement is hereby amended
as follows:

         a. Section 6.09 of the Credit  Agreement is hereby amended by inserting
the following subclause (j) at the end of Section 6.09:

         "(j) the  repurchase at market value of up to $1,200,000 of the capital
stock of the Borrower."

        b. The definitions of "Bond Indebtedness" and "Bond Indenture" set forth
in Annex A of the Credit  Agreement are hereby amended in their entirety to read
as follows:

                           "Bond Indebtedness" means, collectively, Indebtedness
        of the Borrower and the Guarantor in the aggregate  principal  amount of
        $215,000,000  evidenced  by  their  11 1/2%  Senior  Notes  due 2004 and


        Indebtedness  of  the  Borrower  and  the  Guarantor  in  the  aggregate
        principal amount of $60,000,000  evidenced by their 11 1/2% Senior Notes
        due 2004.

                           "Bond Indenture"  means,  collectively,  that certain
        Indenture dated November 14, 1996 between the Borrower and the Guarantor
        as issuers  and IBJ  Schroder  Bank & Trust  Company as trustee and that
        certain  Indenture  dated  January 27, 1998 between the Borrower and the
        Guarantor as issuers and IBJ Schroder Bank and Trust Company as trustee.

                  Section 3. Bond Proceeds.  The Borrower shall use a portion of
the proceeds from the 11 1/2% Senior Notes due 2004 issued after the date hereof
to repay all outstanding Loans under the Credit Agreement in excess of $100,000.

                  Section 4.  Ratification.  The  Borrower  hereby  ratifies and
confirms all of the Obligations  under the Credit  Agreement (as amended hereby)
and the other Loan Documents and the Liens created under the Security Documents.
All  references in the Loan Documents to the "Credit  Agreement"  shall mean the
Credit Agreement as amended hereby and as the same may be amended, supplemented,
restated or otherwise modified and in effect from time to time in the future.

                  Section 5. Effectiveness.  The effectiveness of this Amendment
is subject to the  condition  precedent  that the Agent shall have received this
Amendment  executed  by the  Borrower  and each member of the Bank Group in such
number of counterparts as may be reasonably requested by the Agent.

                  Section 6. Representations and Warranties. The Borrower hereby
represents and warrants to the Bank Group that (a) the  execution,  delivery and
performance  of  this  Amendment  has  been  duly  authorized  by all  requisite
corporate  action on the part of the Borrower,  (b) each of the Credit Agreement
(as  amended  hereby)  and the  other  Loan  Documents  to  which  it is a party
constitutes  a valid and  legally  binding  agreement  enforceable  against  the
Borrower in accordance  with its terms  except,  as such  enforceability  may be
limited  by  bankruptcy,  insolvency,  reorganization,   moratorium,  fraudulent
transfer or other  similar laws  relating to or  affecting  the  enforcement  of
creditors'  rights  generally  and by  general  principles  of  equity,  (c) the
representations and warranties by the Borrower contained in the Credit Agreement
as amended hereby and in the other Loan Documents are true and correct on and as
of the date  hereof  in all  material  respects  as  though  made as of the date
hereof, (d) no Default or Event of Default exists under the Credit Agreement (as
amended hereby) or any of the other Loan Documents.

                  Section 7. Choice of Law. This Amendment shall be governed by,
and construed in accordance with, the laws of the State of New York.

                                      -2-


                  Section 8. Final  Agreement.  THE CREDIT AGREEMENT (AS AMENDED
HEREBY) AND THE OTHER LOAN DOCUMENTS  REPRESENT THE FINAL AGREEMENT  BETWEEN THE
PARTIES AND MAY NOT BE  CONTRADICTED  BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS  OR
SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO ORAL AGREEMENTS BETWEEN
THE PARTIES.

                  Section 9. Counterparts. This Amendment may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which when so  executed  shall be deemed to be an  original,  and all of
which taken together shall constitute one and the same agreement.


                  [REMAINDER OF PAGE LEFT BLANK INTENTIONALLY]

                                      -3-




                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Amendment to be executed by its officers  thereunto  duly  authorized  as of the
date first above written.

                                        ABRAXAS PETROLEUM CORPORATION


                                        By:/s/ Chris E. Williford
                                        Chris E. Williford
                                        Executive Vice President



                                        BANKERS TRUST COMPANY,
                                         as Agent and Bank


 
                                        By:/s/ Mary Jo Jolly
                                        Name: Mary Jo Jolly
                                        Title: Assistant Vice President

                                        ING (U.S.) CAPITAL CORPORATION,
                                         as Co-Agent and Bank


                                        By: /s/ Christopher R. Wagner
                                        Name: Christopher R. Wagner
                                        Title: Vice President

                                        UNION BANK OF CALIFORNIA, N.A.,


                                        By: /s/ Carl Stutzman
                                        Name: Carl Stutzman
                                        Title: Vice President


                                        By: /s/ Tony R. Weber
                                        Name: Tony R. Weber
                                        Title:

                                      -4-


                  The foregoing  Second Amendment to Amended and Restated Credit
Agreement is hereby  acknowledged and agreed to effective as of this 23rd day of
January, 1998.

                                        CANADIAN ABRAXAS PETROLEUM
                                        LIMITED



                                         By:      /s/ Chris E. Williford
                                         Name: Chris E. Williford
                                         Title: Vice President



                                      -5-