Education Ph.D. in Geology, University of California at Berkeley, 1989Thesis Advisor: Walter Alvarez
Thesis: Studies of the Stratigraphic and Structural Record of Large Volcanic and Impact Events
 M.S. in Geology, University of Michigan, Ann ArborThesis Advisor: David Wiltschko
 B.A. in Geology, University of Colorado, Boulder NSF Advisor: Richard Madole
  Positions Held Associate Professor of Geology, Department of Earth and Environmental Sciences and Senior Research Scientist, Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York; 1993, tenured 1996

Assistant Professor of Geology, Department of Geological Sciences and Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York; 1989-1993

Research Assistant and Teaching Assistant, Department of Geology and Geophysics, University of California at Berkeley; 1983-1989

Research Geologist, U.S. Bureau of Reclamation, Engineering and Research Center; Denver, Colorado; Seismotectonics Section, 1981-1983, GS 11

Research Geologist, U.S. Bureau of Mines, Research Center; Denver, Colorado; Rock Mechanics Branch, 1979-1981, GS 9

Undergraduate Teaching Assistant: Introductory Earth Sciences, 1975

Field Assistant, Peter Birkeland, neoglacial stratigraphy of the Wind River Mountains, Wyoming, summers: 1972, 1973