AMENDMENT NO. 1 TO MERGER AGREEMENT THIS AMENDMENT NO. 1 TO MERGER AGREEMENT (this "AMENDMENT"), dated as of November 23, 1999, by and between COMPAGNIE GENERALE DE GEOPHYSIQUE, a French societe anonyme (the "Parent"), SERCEL ACQUISITION CORP., a...Merger Agreement • November 23rd, 1999 • General Geophysics Co • Oil & gas field exploration services • New York
