1940 - Born in Berkeley, California. An American geologist and expert on plate tectonics, mountain formation, causes of mass extinctions, and paleomagnetism.
1962 - He earned his B.A. in geology.
1967 - Received his Ph.D. in geology from Princeton University.
- He was a geologist in The Netherlands and Libya with American Overseas Petroleum.
1977 - Came to Berkeley, and began a study of the mass extinction at the end of the Cretaceous Period, as recorded in the Italian limestones.
1981 - He was a professor of geology and geophysics, University of California, Berkeley.
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