William Ridley



B.Sc. (Geology/Chemistry), Royal College of Science, Univ. of London, 1964 Associate (Geochemistry),  Royal School of Mines,  Univ. of London  1968 Ph.D. (Geochemistry, Volcanology), Royal College of Science,Univ. of London  1968

Employment History:

Present USGS Assignments:

  • Project Chief. Non-Traditional Stable Isotopes, Mineral Resources Team
  • Task Chief, Multi-collector ICP-MS Task, Research Chemistry Project, Mineral Resources Team

Previous USGS Assignments:

  • Staff Scientist, Central Colorado Project Staff Scientist, Integrated Studies of National Parks (Big Bend)
  • Adjunct Professor, Colorado School of Mines
  • Section Chief, Branch of Exploration Geochemistry and Branch of Geochemistry

Career prior to USGS:

  • Consultant Geochemist, Evergreen, CO
  • Geochemist, Geoexplorers International, Denver, CO
  • Exploration Manager, Beard Oil Company, Evergreen , CO
  • Research Specialist, Exxon Production Research Company, Houston, TX
  • Adjunct Professor, Columbia University, NY, NY
  • Anglo-American Visiting Professor of Geochemistry, University of Witswatersrand, Johanessburg, SA
  • Associate Professor, Columbia University, NY, NY
  • Adjunct Professor, Rutgers University, New Brunswick, NJ
  • Staff Scientist, Lunar and Planetary Institute, Houston, TX
  • National Research Council Associate, NASA-MSC, Houston, TX
  • Research Geologist, British Geological Survey, London, UK


  • 141 abstract and extended abstracts
  • 125 peer-reviewed papers


  • Judd Research Prize, Imperial College, London University
  • NASA Distinguished Service Award
  • USGS Star Award
  • Ten NASA Research Grants
  • Seven NSF Research Grants
  • Four Miscellaneous Awards (EPRI, DOE, ONR)
  • Three USGS Venture Capital Awards