Geobiology, Astrobiology, Paleoclimate, Paleoceanography (GAPP) Research Group
Broadly, I am a sedimentary and organic geochemist. I focus on the redox evolution of the Earth, specializing in biogeochemical cycling. I use a range of geochemical tools, but focus on the stable isotopes of nitrogen, carbon, and sulfur, with a particular interest in compound-specific, stable isotope techniques. My research interests span the spectrum of geologic time from the Archean to modern systems. Currently I am working principally on the Cretaceous and Neoproterozoic with an eye toward understanding future global change.