Triangle Petroleum (TPLMQ) 8-K Departure of Directors or Principal Officers

Exhibit 99.2

John D. Carlson

Box 13, Site , RR1

Priddis, Alberta

T0L 1W0

Triangle Petroleum Corporation

Dear Board Members,

Please accept this letter as my formal resignation from the position of Director of Triangle Petroleum Corporation effective August 2, 2007.

I have enjoyed working with Triangle from its inception and I wish the Board and the management of the Company continued success in its future endeavors.

Sincerely,

/s/ JOHN D. CARLSON

John D. Carlson