I am a faculty member in the Division of Geological and Planetary Sciences at Caltech, and am affiliated with the geobiology, geochemistry, and environmental science academic options. I study organic materials in both modern and ancient environments, using their molecular structure and stable-isotopic composition to understand where they come from, what processes have affected them, and what environmental conditions they record. This gets variously described as organic geochemistry, geobiology, and biogeochemistry. My research spans a range of interests, from records of life on the ancient Earth to carbon cycling in the modern oceans, and lots else in between. Current research projects are described here.

My research group currently consists of a lab manager, 2 postdocs, and 1 PhD student. You can see their smiling faces here. If you are interested in coming to work with me as a student or postdoc, please email.

I currently teach three courses at Caltech:  Organic Geochemistry (Ge 143), Isotope Ratio Mass Spectrometry (Ge 145), and Stable Isotope Biogeochemistry (Ge 146). In general, Ge-143 and 145 are taught in the fall in alternate years, 146 is in the spring term. Global Biogeochemical Cycles (ESE 103, formerly ESE148c), which I used to teach, is now taught by Paul Wennberg.  I also teach in the Agouron International Geobiology Course during the summers, and highly recommend it.

Caltech is considering a new faculty hire in the field of global biogeochemistry, broadly defined. If you are interested, even several years down the road, please send me an email.

Copyright 2011 by Alex Sessions. All rights reserved.