Degree: When, where, what, and what in? I received my PhD in geological sciences in 1993 in a joint program between the Lamont-Doherty Earth Observatory (LDEO) of Columbia University and the American Museum of Natural History (AMNH). My thesis focused on the geochemistry of platinum group metals in igneous rocks. My research project was largely experimental in nature, but was motivated in part by a fascination with the phenomena of sulfide melt immiscibility observed in mid-ocean ridge basalts, the subject of my master's degree in oceanography from the University of Washington. My undergraduate work at the University of Virginia was in environmental sciences and culminated in a senior thesis on beach sediment transport, a project that inspired me to pursue graduate study in ocean sciences.
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