Welcome! Our group is principally interested in reconstructing the physical and biogeochemical conditions in ancient environments. As the laboratory name suggests, we do this by measuring stable isotope ratios - presently of carbon, nitrogen, and oxygen - in a variety of natural materials, including minerals and organic molecules.

We are currently working on development and application of a number of novel and technically challenging measurements: carbonate clumped isotopes, an elemental analyzer capable of measuring carbon and nitrogen isotopes on very small samples, and, eventually, triple oxygen isotopes and other clumped isotope systems. Our laboratory space houses basic sample preparation facilities, organic and acid fume hoods, a multipurpose vacuum line for handling gases, and two isotope ratio mass spectrometers.

The Department of Geosciences has a long history of excellence in analytical geochemistry, and we're involved in several exciting collaborations across campus with the Turkana Basin Institute, The Interdepartmental Program in Anthropological Sciences, and the School of Marine and Atmospheric Sciences. Greg is formally affiliated with all these centers and can therefore (co-)supervise students in these departments/schools.

Importantly, we are committed to maintaining and promoting a safe, healthy, and inclusive laboratory environment for all current and future group members. We recognize that the geochemistry, geoscience, and STEM fields are disproportionate in terms of race, ethnicity, gender identity, sexual orientation, disability status, and country of origin, and it is a group mission to foster a nuclear, departmental, university, and global geoscience community that works for equity and the inclusion of everyone. Our Department of Geosciences Equity, Diversity, and Inclusion (EDI) statement, committee members, and action items can be found here. Do you want to do something positive right now to help us effect change? Donate to the Wonder Fund. We did. That alone is not nearly enough, but it's a small step in the right direction.