School of Earth, Energy & Environmental Sciences
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Ph.D. Student in Geological Sciences
Current Research and Scholarly InterestsMy overall goal is to improve our understanding of the effect of major evolutionary environmental transitions on the sizes of organisms. Using phylogenetic comparative methods, I analyze various animal groups that inhabit an array of different habitats (such as marine, freshwater, and terrestrial environments) for significant differences in body size between group members that inhabit those different habitats. Such groups may include gastropods, mammals, reptiles, etc.
Welton Joseph and Maud L'Anphere Crook Professor and Professor, by courtesy, of Geophysics and of Energy Resources Engineering
Current Research and Scholarly InterestsSedimentary basin analysis; petroleum geology
Professor (Research) of Geological Sciences
Current Research and Scholarly InterestsResearch
I study the evolution of the Earth's crust by undertaking petrologic and geochemically-based research that is grounded with fieldwork. I co-direct the Stanford-USGS ion probe laboratory and develop geochronologic methods to constrain crystallization, metamorphic, and metasomatic histories of the middle to deep crust. Similarly, because heat flow characteristically attends mass transfer during crustal deformation, I employ 40Ar/39Ar and (U-Th)/He thermochronology to extract thermal history information from minerals to constrain the timing and magnitude of fault slip as well as erosional and tectonic denudation. Finally, I am heavily involved in provenance studies to constrain aspects of crustal deformation and erosion that are only preserved in the sedimentary record.