My research centers on sedimentology and stable isotope geochemistry, with a focus on understanding the paleoclimate and redox evolution of ancient marine environments. As a sedimentologist, I study the formation, composition, and diagenesis of sedimentary rocks, and utilize my observations to reconstruct past depositional environments. Through the use of stable isotope geochemistry, I investigate shifts in isotopic signatures, such as carbon and uranium, to infer changes in oceanic conditions, particularly during key intervals of Earth's history. My work aims to provide insights into the dynamics of ancient ocean chemistry and the role of redox fluctuations in shaping Earth’s past climate.
Current Project: Carbonate uranium isotopes record ocean oxygenation in the Ediacaran Portfjeld Group, North Greenland
George Mason University - Master's Thesis
By examining uranium isotopes from Ediacaran-age rocks in Northern Greenland, I hope to contribute to our understanding of the transitions from anoxic to oxygen-rich conditions in marine systems, and their implications on the global carbon cycle and the evolution of life on Earth. Check out my GSA 2024 poster for preliminary findings.
Sperry Wash, Death Valley National Park, California, USA (March 2024)
Thompson, S., Gan, T., Pedersen, M., Doerrler, A., Segessenman, D., Remirez, M., Rugen, E. J., Frei, R., Kaufman, A., & Gilleaudeau, G. (2024, September 22). Carbonate uranium isotopes record ocean oxygenation in the Ediacaran Portfjeld Group, North Greenland: Geological Society of America Abstracts with Programs. Vol. 56, No. 5, 2024 https://gsa.confex.com/gsa/2024AM/meetingapp.cgi/Paper/403899
Thompson, S.M., Mollica, Matthew. Thornton, Quillen. Manning-Berg, Ashley. Muhlbauer, Jason: Mississippian algal structures within the Bangor Limestone Formation at Raccoon Mountain, Chattanooga, Tennessee: Geological Society of America Abstracts with Programs. Vol 54, No. 5, 2022. https://doi.org/10.1130/abs/2022AM-380242
Mollica, Matthew; Thornton, Quillen; Thompson, S.M; Manning-Berg, Ashley; DeVries, Stephanie: Assessing anthropogenic effects on water quality in Raccoon Mountain Caverns, Chattanooga, Tennessee: Geological Society of America Abstracts with Programs. Vol 54, No. 5, 2022. https://doi.org/10.1130/abs/2022AM-380248