EXHIBIT 2.1 AMENDMENT NO. 2 TO AGREEMENT AND PLAN OF MERGER This Amendment No. 2 (this "AMENDMENT") dated May 17, 2001, to that certain Agreement and Plan of Merger dated December 22, 2000 (as in effect on the date hereof, the "AGREEMENT"), is entered...Agreement and Plan of Merger • June 7th, 2001 • Petrocorp Inc • Crude petroleum & natural gas • Delaware
