Skip Navigation
ConocoPhillips School of Geology & GeophysicsOU homepageConocoPhillips School of Geology & Geophysics

Gerilyn S. "Lynn" Soreghan

James Roy Maxey Professor, David L. Boren Professor

Gerilyn S. "Lynn" Soreghan

Ph.D., 1992 University of Arizona
B.S., 1986, University of California, Los Angeles

Office: SEC 868
Phone: 405-325-4482
Fax: 405-325-3140

Areas of Interest

Sedimentology, Stratigraphy, and Paleoclimate


Earth's "deep-time" sedimentary record houses climate states dramatically different from our modern or recent world. My research is primarily field-based, but I collaborate with colleagues at OU and elsewhere in using geochemistry, geochronology, magnetism, and climate modeling as applied to the sedimentary record to refine our understanding of climate and linked processes. The late Paleozoic world (~300 My ago) captures my interest because it archives Earth's last great "icehouse" and collapse of that icehouse, glacial-interglacial climate swings like those of the recent, global mountain building that culminated in the Pangaean supercontinent, and perhaps the dustiest atmosphere in the planet's history. Working with students and colleagues, my current research includes (1) investigating hypotheses of tropical glaciation and orogenic (mountain) collapse in the enigmatic Ancestral Rocky Mountains, (2) gauging dustiness of the late Paleozoic atmosphere and possible effects on the biosphere and carbon cycling, (3) high-frequency, glacial-interglacial climate change, and (4) assessing physical and chemical weathering trends in various climate systems. For more details, please visit my personal webpage.

Courses Taught

Introductory Geology (Honors)

Earth, Sustainability, and the Economy (Honors)

Depositional Systems and Stratigraphy

Earth's Past Climate

Sedimentology / Stratigraphy Seminar

Paleozoic Carbonates and Sequence Stratigraphy

Selected Publications

Soreghan, G., 1992, Preservation and paleoclimatic significance of eolian dust in the Ancestral Rocky Mountains province: Geology, v. 20, p. 1111–1114.

Soreghan, G., and Giles, K., 1999, Amplitudes of Late Pennsylvanian glacioeustasy: Geology, v. 27, no. 3, p. 255–258.

Kessler, J., Soreghan, G., and Wacker, H., 2001, Equatorial Aridity in Western Pangea: Lower Permian Loessite and Dolomitic Paleosols in Northeastern New Mexico, USA: Journal of Sedimentary Research, v. 71, no. 5, p. 817–832.

Soreghan, G., Elmore, R., and Lewchuk, M., 2002, Sedimentologic-magnetic record of western Pangean climate in upper Paleozoic loessite (lower Cutler beds, Utah): Bulletin of the Geological Society of America, v. 114, no. 8, p. 1019–1035.

Soreghan, G., Sweet, D., Marra, K., Eble, C., Soreghan, M., Elmore, R., Kaplan, S., and Blum, M., 2007, An Exhumed Late Paleozoic Canyon in the Rocky Mountains: The Journal of Geology, v. 115, no. 4, p. 473–481.

Soreghan, M., and Soreghan, G., 2007, Whole-rock geochemistry of upper Paleozoic loessite, western Pangaea: Implications for paleo-atmospheric circulation: Earth and Planetary Science Letters, v. 255, p. 117–132.

Soreghan, G., Soreghan, M., Poulsen, C., Young, R., Eble, C., Sweet, D., and Davogustto, O., 2008, Anomalous cold in the Pangaean tropics: Geology, v. 36, p. 659–662.

Soreghan, G., Soreghan, M., and Hamilton, M., 2008, Origin and significance of loess in late Paleozoic western Pangaea: A record of tropical cold?: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 268, no. 3-4, p. 234–259.

Soreghan, G.S., Soreghan, M.J., Sweet, D.E., and Moore, K.D., 2009, Hot Fan or Cold Outwash? Hypothesized Proglacial Deposition in the Upper Paleozoic Cutler Formation, Western Tropical Pangea: Journal of Sedimentary Research, v. 79, no. 7, p. 495–522.

Sweet, D.E., and Soreghan, G.S., 2010, Late Paleozoic tectonics and paleogeography of the ancestral Front Range: Structural, stratigraphic, and sedimentologic evidence from the Fountain Formation (Manitou Springs, Colorado): Geological Society of America Bulletin, v. 122, p. 575–594.

Sur, S., Soreghan, G., Soreghan, M., Yang, W., and Saller, A., 2010, A record of glacial aridity and Milankovitch-scale fluctuations in atmospheric dust from the Pennsylvanian tropics: Journal of Sedimentary Research, v. 80, p. 1046–1067.