Roger M. Slatt, 78, died on February 22, 2020. He received an A.A. from San Francisco City College in 1961. Soon after, he gained his B.A. from California State University in 1965, followed by M.S. and Ph.D. in Geology from the University of Alaska in 1967 and 1970 respectively. After receiving his Ph.D., he taught geology for eight years at Memorial University of Newfoundland and at ASU. After his teaching and research experience, Roger spent 14 years in the petroleum industry as Research Manager with Cities Service Research, ARCO Research, and ARCO International Oil and Gas Co. before joining Colorado School of Mines as professor and head of the Geology and Engineering Department in 1992. Eight years later, he was named Director of the School of Geology and Geophysics at University of Oklahoma, holding this position until 2006. Leaving the directive of the School allowed Roger to focus solely on teaching, research, and his students through his Reservoir Characterization Institute, founded in 2003. Roger was Gungoll Family Chair Professor in Petroleum Geology and Geophysics at University of Oklahoma. He published approximately 150 articles and abstracts and is author/co-author/editor of six books on a wide range of petroleum geology topics. Considered an industry expert, he has been an AAPG and SPE Distinguished Lecturer, and presented courses internationally for industry and government organizations. He is the recipient of the AAPG Distinguished Service Award, the Esso Australia Distinguished Lecturer in Petroleum Geology, AAPG Honorary Membership, AAPG Grover Murray Distinguished Educator Award, Society of Exploration Geophysicists (SEG) Special Commendation Award, and most recently the 2012 Jules Braunstein Memorial Award for co-authoring a poster with colleague Younane Abousleiman on 'Merging sequence stratigraphy and geomechanics for unconventional gas shales". Roger was preceded in death by his wife, Linda Gay, and a brother. He is survived by two children and two grandchildren. A Celebration of Life will take place on Saturday, March 28, 2020, from 12:00 p.m. until 4:00 p.m. at the Beaird Lounge in the University of Oklahoma Memorial Union, 900 Asp Avenue, Norman, OK. Contributions honoring Roger's memory can be made to OU Foundation supporting Colombian and Venezuelan students. For more information about OU Foundation donations please contact Yoana Walschap . Donations may be made to ASPCA or St. Jude's . (Source: ASU Foundation)