GSA Connects 2021 in Portland, Oregon

Paper No. 74-2
Presentation Time: 8:15 AM


GULBRANSON, Erik1, SHELDON, Nathan2, MONTANEZ, Isabel3, TABOR, Neil J.4 and MCINTOSH, Julia A.4, (1)Department of Geology, Gustavus Adolphus College, 800 W College Ave, St Peter, MN 56082, (2)Department of Earth and Environmental Sciences, University of Michigan, 1100 N University Ave, Ann Arbor, MI 48109-1005, (3)Department of Earth and Planetary Sciences, University of California, Davis, One Shields Ave., Davis, CA 95616, (4)Roy M. Huffington Department of Earth Sciences, Southern Methodist University, 3225 Daniel Ave, Dallas, TX 75205

Paleosols represent fossil records of paleolandscape processes, paleobiotic interactions with the land surface, and paleoclimate. Paleosol-based reconstructions have figured prominently in the study of significant changes in global climate and terrestrial life, with one of the more highly studied examples being the end-Permian extinction (EPE). The EPE was once thought to consist of synchronous extinctions in the marine realm and the terrestrial realm, with the latter displaying a lower magnitude extinction of vertebrate, insect, and plant life. However, emerging stratigraphic records, anchored by high-precision U-Pb ages, and compilations of fossil taxa suggest that the terrestrial realm on Gondwana experienced an asynchronous extinction record with the marine realm; and, at the global-scale, possibly the lack of a true mass extinction for plant communities. Moreover, paleosol-based interpretations of the EPE on Gondwana typically focus on one depositional basin and extrapolate those finding to assess the potential for global paleoenvironmental/paleoclimatic change. This review compiles observations of paleosols, sedimentology, stratigraphy, and geochemical data across Gondwana during the Late Permian in order to critically assess these interpretations of global change in the lead up to the EPE.