you have to think like a fish – that’s the art form." History Meissner was born and raised in Denver, Colorado and graduated from South High School. Both of his parents were the first generation in their families that was not involved in the extraction of Western U.S. natural resources. It was here that his connection to the Rocky Mountains was cemented. He developed an interest in rocks and mining and attended the Colorado School of Mines, graduating with the degree in Geological Engineering in 1953. He was an ROTC cadet at Mines and received a commission upon graduation, but deferred his call to Korean War era service for one year in order to complete his master's degree, graduating in 1954, the year he joined AAPG. Funded by a Shell fellowship, his master's thesis concerned the geology of the Doctor Mine, a lead zinc replacement deposit in the Leadville Limestone, in Gunnison County, Colorado. After completing a tour of duty with the United States Army Corps of Engineers in 1956 he began his professional career with Shell Oil Company, where he worked for the next 17 years. While enrolled in Advanced Petroleum Geology as a graduate student (a course Meissner taught at Mines), he studied the hydrodynamic work of Dr. M. King Hubbert and recognized it as a key to certain aspects of petroleum migration and trapping. While at Shell Oil Company he worked with a number of leading petroleum explorationists and, notably, with M. King Hubbert, acknowledged by Meissner as his mentor. While with Shell he was able to apply hydrodynamic concepts to the occurrence of oil accumulations in deep-water turbidite channels that he identified and mapped in the Delaware Basin of West Texas and southeastern New Mexico. Recognizing the presence and potential of tilted oil water contacts in the turbidities, he presented his ideas to management. The manager derided them, refusing to recognize that water contacts could be anything other than horizontal. Shortly after this, the manager retired and Shell brought in a new manager that recognized the potential of the concept and encouraged Meissner to pursue his ideas. As a result, he developed several prospects, three of which subsequently “found oil fields.” In recognition of Meissner's potential, in 1965 he was transferred to Shell Development Company in Houston where he conducted basic research on hydrocarbon origin, migration and accumulation. In Houston Meissner refined his understanding of the