I’m the “hard rock” geologist at Pomona College. I study a wide variety of geologic processes that are recorded in Earth’s Igneous and Metamorphic rocks. My students and I consider geologic questions at a range of scales, from porphyroblasts to plutons, using a host of field, petrologic, and geochemical tools, with special emphasis on stable isotope geochemistry. My studies of fluid flow during contact metamorphism mean that I regularly advise students studying economic and sub-economic skarn and sulfide ore systems. I teach our courses in Mineralogy, Natural Resources, Geochemistry, and Igneous and Metamorphic Petrology along various flavors Introductory Geology. I also direct the Pomona College X-ray Fluorescence Lab housing a 4.2 kW Thermo-ARL wavelength dispersive XRF to measure a host of major and trace elements are pushing the limits with rare earth element analysis using a LiF 420 crystal. I am one of the directors of the Oxtoby Isotope Lab (OIL) at Pomona College. You can see samplings of research projects, publications, funding, interesting images from our research, and other tidbits in the tabs on this site.