Professional Experience:
- 1944-46: US Navy
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1948-49: University of Kansas Research Foundation, biogeochemical prospecting project - lead and zinc; Teaching Assistant, Department of Geology, University of Kansas
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1950-51: US Geological Survey, biogeochemical prospecting for uranium and vanadium, Utah and Colorado
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1951-53: Exploration Geologist, Carter Oil Company, Shreveport and Tulsa
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1952: Laboratory Instructor, Centenary College, Shreveport
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1954-55: Consulting Geologist
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1955-58: Consultant, Humble Oil and Refining Company, Houston
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1955-61: Assistant Professor, Department of Geology, Stanford University
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1961-66: Associate Professor, Department of Geology, Stanford University
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1958-76: Consultant, Kansas Geological Survey, University of Kansas
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1966-69: Consultant, Humble Oil and Refining Co., Esso Production Research Co.
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1966-77: Professor, Department of Geology, Stanford University
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1966-1993: Professor, Department of Applied Earth Sciences, Stanford University
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1993- :Professor of Geological Sciences and Petroleum Engineering, Stanford University
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1969-72: Associate Editor, Bulletin American Association Petroleum Geologists
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1971-72: Visiting Research Scientist, Kansas Geological Survey, University of Kansas
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1973-80: Consultant, Petroleos Mexicanos, Mexico
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1975-76: Consultant, Southern California Edison Company
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1977-79: Consultant, PETROBRAS, Rio de Janeiro, Brazil
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1978-80: Consultant, Leasing Programs Office, US Department of Energy
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1978-80: Consultant, Office of Minerals Policy and Research Analysis, Dept. of Interior
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1978-80: Consultant, National Uranium Evaluation Program, US Department of Energy
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1978-81: Consultant, US Bureau of Land Management
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1978-present: Chairman and Co-founder, Terrasciences, Inc., Littleton, Colorado
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1980-82: Associate Editor, Bulletin American Association Petroleum Geologists
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1982 :Consultant, Norwegian Institute of Technology, University of Trondheim
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1980-83: Consultant, ARCO Oil and Gas Company
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1983-86: Associate Editor, Bulletin American Association Petroleum Geologists
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1983-86: Consultant and Expert Witness, Gibson, Dunn and Crutcher, Attorneys, Denver
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1986-87: Consultant, Daniel H. Wagner Associates
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1986-92: Associate Editor, Geobyte Magazine
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1990-present: Chairman and Co-founder, Horizontal Development and Production Company, Palo Alto, California, and Austin, Texas
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1994-95: W. M. Keck Foundation Professor of Exploration Science (visiting), Colorado School of Mines (appointed September, 1 1994 to June 2, 1995)
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