- PhD, Earth Sciences, 1979—University of California, Santa Cruz
- MS, Earth Sciences, 1977—University of California, Santa Cruz
- MA, Biology, 1976—University of California, Santa Cruz
- BS, Biology, 1972—University of California, Santa Cruz
My research has been on pre-Quaternary climates, and I have focused on three general themes: paleo-upwelling in the oceans and its effect on sedimentary rocks and fossils; the climate of the supercontinent Pangea; and high-latitude climate in the Cretaceous. Early in my career, I engaged mostly in conceptual climate modeling and meta-analysis of large data sets on sedimentary rocks and fossils related to climate. In more recent years, I have focused more on field studies on specific problems raised during the earlier work in modeling.
After more than 7 years of full or half-time administration, I returned (summer 2007) to teaching and research. In addition to continuing the work on Pangean and Cretaceous climates, I am involved in research on the use of language in public discourse on global warming. From 2008-2009, I was President of the Geological Society of America.
I am also a commercial pilot and flight instructor; I've been flying for more than 18 years. I specialize in mountain and back-country flying, which is great for looking at geology!