SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549



                                   FORM 8-A/A

                                 AMENDMENT NO. 2
                     (to Registration Statement on Form 8-A
                            dated February 24, 1999)


                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                    PURSUANT TO SECTION 12(b) or 12(g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                          Cyprus Amax Minerals Company
              -----------------------------------------------------

             (Exact name of registrant as specified in its charter)


                   Delaware                                      36-2684040
- --------------------------------------------------------------------------------
 (State or other jurisdiction of incorporation)              (I.R.S. Employer
                                                            Identification No.)

 9100 East Mineral Circle, Englewood, Colorado                     80112
- --------------------------------------------------------------------------------
   (Address of principal executive offices)                     (Zip Code)


Securities to be registered pursuant to Section 12(b) of the Act:

     Title of each class                        Name of each exchange on which
      to be registered                          each class is to be registered
- -------------------------------                 ------------------------------
Preferred Share Purchase Rights                    New York Stock Exchange


Securities to be registered pursuant to Section 12(g) of the Act:

                                      None
- --------------------------------------------------------------------------------
                                (Title of class)





Item 1.  Description of Securities.

               In connection with its approval of the Agreement and Plan of
Merger (the "Merger Agreement"), dated as of September 30, 1999, among Phelps
Dodge Corporation ("Parent"), CAV Corporation ("Sub"), and Cyprus Amax Minerals
Company (the "Corporation"), on September 30, 1999, the Board of Directors of
the Corporation amended the shareholder rights plan set forth in the Rights
Agreement (the "Rights Agreement"), dated as of February 28, 1999, between the
Corporation and The Bank of New York, as Rights Agent (the "Rights Agent"). This
Amendment No. 2 to the Rights Agreement (the "Amendment") amends the Rights
Agreement to provide (1) that neither Parent, Sub, nor any other Person, shall
be deemed to be an Acquiring Person by virtue of the Merger Agreement, or as a
result of the consummation of the exchange offer or any of the other
transactions contemplated by the Merger Agreement; (2) that the Rights shall
expire immediately prior to the completion of the merger of Company and Sub as
contemplated by the Merger Agreement; and (3) that the transactions contemplated
by the Merger Agreement will not give any holder of Rights any particular
rights, remedies, or claims not previously held.

               The Amendment is attached hereto as an exhibit to this Form 8-A/A
and is incorporated herein by reference. The foregoing description is qualified
in its entirety by reference to the full text of the Amendment and of the Rights
Agreement. All capitalized terms not defined herein shall have the meaning
ascribed to them in the Rights Agreement.

Item 2.  Exhibits.

         1.  Rights Agreement, dated as of February 28, 1999, between Cyprus
Amax Minerals Company and The Bank of New York, which includes the form of Right
Certificate as Exhibit A and the Summary of Rights to Purchase Preferred Shares
as Exhibit B (incorporated by reference to Exhibit 4 of Cyprus Amax Minerals
Company's Form 8-A, filed with the Securities and Exchange Commission on
February 24, 1999).

         2.  Amendment No. 2 to the Rights Agreement, dated as of September 30,
1999, between Cyprus Amax Minerals Company and The Bank of New York, as Rights
Agent.







                                    SIGNATURE


               Pursuant to the requirements of Section 12 of the Securities
Exchange Act of 1934, the registrant has duly caused this registration statement
to be signed on its behalf by the undersigned, thereunto duly authorized.


                                     CYPRUS AMAX MINERALS COMPANY


                                     By:  /s/ Philip C. Wolf
                                          ------------------------------------
                                          Philip C. Wolf
                                          Senior Vice President


Dated:  October 4, 1999







                                  EXHIBIT LIST


1.       Rights Agreement, dated as of February 28, 1999, between Cyprus Amax
         Minerals Company and The Bank of New York, which includes the form
         of Right Certificate as Exhibit A and the Summary of Rights to
         Purchase Preferred Shares as Exhibit B (incorporated by reference to
         Exhibit 4 of Cyprus Amax Minerals Company's Form 8-A, filed with the
         Securities and Exchange Commission on February 24, 1999).

2.       Amendment No. 2 to the Rights Agreement, dated as of September 30,
         1999, between Cyprus Amax Minerals Company and The Bank of New York, as
         Rights Agent.