Chacko J. John, PhD
Chacko J. John is Director, State Geologist and Professor-Research at the Louisiana Geological Survey (LGS), Louisiana State University (LSU). He holds M.S. and Ph.D degrees in Geology from the University of Delaware, and B.Sc. and M.Sc. Degrees in Geology from the University of Nagpur (India). Prior to his present position he served as Director of the Basin Research Institute of Louisiana State University, which is now the Basin Research Energy Section of the LGS.
John joined the LGS in 1987 and subsequently held the positions of Assistant Professor-Research, Associate Professor-Research, Chief, Energy and Mineral Resources Section, and Director of Research before being appointed to his current position in 1997. He has previously served as an advanced geologist with Marathon Oil Company, as a senior exploration geologist with Geo Consultants International, and as geologist-in-charge of the Akula Clay mine with English India Clays Ltd.
John is a member of many professional associations and has served as president of the Louisiana Section of the American Institute of Professional Geologists (AIPG), the Energy Minerals Division of the American Association of Petroleum Geologists (AAPG), the Gulf Coast Association of Geological Societies (GCAGS), and the Baton Rouge Geological Society. He was elected as a Fellow of the Geological Society of America in 2004, has been a recipient of professional society awards, and is the author and/or co-author of numerous technical reports, book chapters, professional presentations and journal publications.
His fields of research specialization are petroleum geology, sedimentology, reservoir characterization, depositional environments and models of clastic sandstone reservoirs, geopressured-geothermal energy resources, coastal geomorphology and environmental geology.
Marty Horn joined the Louisiana Geological Survey as an assistant professor of research in January 2007. He had previously been employed at LSU since 2002 as an instructor in the LSU Department of Geology and Geophysics, where he also served as the field camp director.Horn earned a B.S. in Geophysics at the University of Oklahoma in 1982, an M.S. in Geology at the Arizona State University in 1986, and a Ph.D. in Mathematical Sciences & Geology at the University of Texas at Arlington in 1996. After graduation he taught courses in Mineralogy, Petrology, Volcanology, and Field Geology at UTA as an adjunct professor.While at UTA Horn also worked as a geologist for Snyder Oil Company, where he primarily focused on the Hosston and Cotton Valley trends of north Louisiana. At the LGS he has returned to full-time research on north Louisiana oil and gas reserves.
Melissa Esnault is the Office Coordinator of the LGS. She graduated from Louisiana Tech University in Ruston, Louisiana, in 2000 with a B.S. degree in Family Studies with a concentration in Early Childhood Development. Melissa joined LSU in 2007 as a Coordinator in LSU’s Office of Human Resources, where she was the assistant to the associate vice chancellor of Human Resource Management. She was previously employed as an inside sales representative by the Tembec Paper Corporation in St. Francisville, Louisiana and as an executive administrative assistant by the eFederal Credit Union in Baton Rouge. Melissa joined the LGS in 2010.
Jeanne Johnson is the Accounting Technician for the Louisiana Geological Survey and handles all LGS grants, contracts and budgets. Johnson came to work at LSU in 1991 and has worked for the Department of Oceanography and Coastal Sciences, the Coastal Studies Institute and the School of Veterinary Medicine. Jeanne assists LGS researchers in the preparation of their proposal budgets and provides the staff with their respective monthly budget summaries.
Research Associate 3
Patrick O’Neill received a B.S. degree from the LSU School of Forestry in 1985 and worked in photogrammetry before joining the LGS. Pat is in charge of LGS Publications Office as well as the LGS core and well log libraries and facilities. He has experience with GPS data collection and related field work techiques.