Articles | Volume 12, issue 5
Research article
13 May 2016
Research article |  | 13 May 2016

Environmental impact and magnitude of paleosol carbonate carbon isotope excursions marking five early Eocene hyperthermals in the Bighorn Basin, Wyoming

Hemmo A. Abels, Vittoria Lauretano, Anna E. van Yperen, Tarek Hopman, James C. Zachos, Lucas J. Lourens, Philip D. Gingerich, and Gabriel J. Bowen

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Cited articles

Abels, H. A., Clyde, W. C., Gingerich, P. D., Hilgen, F. J., Fricke, H. C., Bowen, G. J., and Lourens, L. J.: Terrestrial carbon isotope excursions and biotic change during Palaeogene hyperthermals, Nature Geosci., 5, 326–329, 2012.
Abels, H. A., Kraus, M. J., and Gingerich, P. D.: Precession-scale cyclicity in the fluvial lower Eocene Willwood Formation of the Bighorn Basin, Wyoming (USA), Sedimentology, 60, 1467–1483,, 2013.
Adams, J. S., Kraus, M. J., and Wing, S. L.: Evaluating the use of weathering indices for determining mean annual precipitation in the ancient stratigraphic record, Palaeogeogr. Palaeocl., 309, 358–366, 2011.
Bowen, G. J., Beerling, D. J., Koch, P. L., Zachos, J. C., and Quattlebaum, T.: A humid climate state during the Paleocene-Eocene Thermal Maximum, Nature, 432, 495–499, 2004.
Short summary
Ancient greenhouse warming episodes are studied in river floodplain sediments in the western interior of the USA. Paleohydrological changes of four smaller warming episodes are revealed to be the opposite of those of the largest, most-studied event. Carbon cycle tracers are used to ascertain whether the largest event was a similar event but proportional to the smaller ones or whether this event was distinct in size as well as in carbon sourcing, a question the current work cannot answer.