Geoffrey Ellis

Dr. Geoffrey Ellis is a gas geochemist who leads the research efforts into understanding the resource potential of geologic hydrogen at the US Geological Survey. His research interests encompass the areas of organic-inorganic interactions in geologic environments, gas isotope geochemistry, and the controls on sedimentary organic geochemistry in aquatic environments. He has published extensively on the process of thermochemical sulfate reduction and the application of compound-specific sulfur isotope analysis, as well as clumped and position specific isotope analysis of hydrocarbons and organosulfur compounds, to problems in petroleum and organic geochemistry.  He holds a bachelor’s degree in geological sciences from Cornell University, a master's degree in geochemistry from the Colorado School of Mines, and a doctorate in marine geology and geophysics from the University of Miami.