My fundamental question as a scientist is to ask, how does paleoenvironmental change influence the macroevolution of species?  To address this, I study rift valleys and examine their geology to contextualize patterns of adaptation and ecosystem change.  As these tectonic structures are deep traps with predictable geometry, they provide some of the only spatially finite records of long-term environmental conditions and biotic response for continental settings.  Most of my fieldwork has been in the Turkana Basin of Kenya, an important archeological and fossil site with a rich record of terrestrial ecosystem evolution spanning 4.0-0.8 Ma.  More recently, I have begun to conduct paleoclimate and chronostratigraphic research on dinosaur-bearing sediments of North America.

My affiliations

Room 202A, Wright Labs, Busch campus, 610 Taylor Road, Piscataway, NJ 08854-8066 USA (phone: 848-445-3410, email:

Paleomagnetics Lab, Lamont-Doherty Earth Observatory, 61 route 9w, Palisades, NY 10964-8000 USA (phone: 845-365-8521, email: