Peter A. Scholle has a B.S. in Geology from Yale and a Ph.D. in Geology from Princeton. Despite that, he has worked in petroleum company research labs (Cities Service and Gulf/Chevron), academia (Univ. of Texas at Dallas and SMU), state and federal agencies (as chief of the Oil and Gas Branch of the USGS and as the State Geologist of New Mexico and director of the NM Bureau of Geology & Mineral Resources). He has done consulting work in more than 20 countries and now is a partner in Scholle Petrographic LLC. He has authored or edited eight books, including five AAPG Memoirs of which two were on carbonate petrography and one on carbonate depositional environments.