Morgan Schaller (born 1982) is an American geochemist and geologist specializing in stable isotope and fluid inclusion geochemistry, which he uses to reconstruct Earth's ancient atmospheric gas concentrations.
[4] Schaller completed postdoctoral research at Yale with Mark Pagani, Brown with Jessica Whiteside, and at the Rutgers Institute of Marine and Coastal Sciences with Yair Rosenthal and Paul Falkowski before joining the faculty at RPI.
Schaller's current interests are broadly in the history of the Earth system and changes in climate over long timescales,[5][6] with a particular focus on intervals of mass extinction or other global-scale perturbations.
Schaller showed that atmospheric CO2 concentrations doubled after each eruptive pulse of flood basalt volcanism, and subsequently decreased over the next few hundred thousand years due to weathering of the lavas themselves.
[14] He and colleague Megan Fung were also the first to observe significant and contemporaneous accumulations of charcoal at the beginning of the PETM event from cores through the Paleocene-Eocene interval on the Atlantic Coastal Plain.