Portal de Periódicos da CAPES

Terrestrial records of a regional weathering profile at the Paleocene-Eocene boundary in the Williston Basin of North Dakota

2006; Geological Society of America; Volume: 119; Issue: 3-4 Linguagem: Inglês

10.1130/b26010.1

1943-2674

Elizabeth R. Clechenko, Daniel Clay Kelly, Guy J. Harrington, Cynthia A. Stiles,

Botany, Ecology, and Taxonomy Studies

Research Article| March 01, 2007 Terrestrial records of a regional weathering profile at the Paleocene-Eocene boundary in the Williston Basin of North Dakota Elizabeth R. Clechenko; Elizabeth R. Clechenko 1Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 W. Dayton Street, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar D. Clay Kelly; D. Clay Kelly 1Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 W. Dayton Street, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Guy J. Harrington; Guy J. Harrington 2School of Geography, Earth and Environmental Sciences, University of Birmingham, Aston Webb Building, Birmingham B15 2TT, UK Search for other works by this author on: GSW Google Scholar Cynthia A. Stiles Cynthia A. Stiles 3Department of Soil Science, University of Wisconsin–Madison, 1525 Observatory Drive, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Elizabeth R. Clechenko 1Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 W. Dayton Street, Madison, Wisconsin 53706, USA D. Clay Kelly 1Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 W. Dayton Street, Madison, Wisconsin 53706, USA Guy J. Harrington 2School of Geography, Earth and Environmental Sciences, University of Birmingham, Aston Webb Building, Birmingham B15 2TT, UK Cynthia A. Stiles 3Department of Soil Science, University of Wisconsin–Madison, 1525 Observatory Drive, Madison, Wisconsin 53706, USA Publisher: Geological Society of America Received: 29 Mar 2006 Revision Received: 05 Sep 2006 Accepted: 26 Sep 2006 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 GEOLOGICAL SOCIETY OF AMERICA GSA Bulletin (2007) 119 (3-4): 428–442. https://doi.org/10.1130/B26010.1 Article history Received: 29 Mar 2006 Revision Received: 05 Sep 2006 Accepted: 26 Sep 2006 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Elizabeth R. Clechenko, D. Clay Kelly, Guy J. Harrington, Cynthia A. Stiles; Terrestrial records of a regional weathering profile at the Paleocene-Eocene boundary in the Williston Basin of North Dakota. GSA Bulletin 2007;; 119 (3-4): 428–442. doi: https://doi.org/10.1130/B26010.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The "orange zone" within the Bear Den Member of the Golden Valley Formation (Williston Basin, North Dakota) represents a terrestrial weathering profile formed by intense pedogenesis during an ancient (ca. 55 Ma) global warming event referred to as the Paleocene-Eocene thermal maximum. Distinctive features of the orange zone include: (1) high abundances of kaolinite, (2) a strongly leached character with a bright orange iron-enriched horizon, (3) poor organic carbon preservation, and (4) ferric pans/pisoliths at its basal contact, equivalent to modern lateritic materials. Though conclusive evidence, such as a distinctive Paleocene-Eocene thermal maximum flora and/or definitive carbon isotope excursion, is lacking, the stratigraphic succession of palynofloral datums preserved within the upper part of the Bear Den orange zone is similar to that associated with the later stages of other terrestrial Paleocene-Eocene thermal maximum records from the U.S. Western Interior. Bulk δ13 Corg ratios decrease through the orange zone as well, but the magnitude of this isotopic decrease is less than that of the carbon isotope excursion. Thus, the collective evidence indicates that the early initial stages of the Paleocene-Eocene thermal maximum are either preserved within the barren, condensed interval of the lower orange zone or are missing altogether from the Williston Basin stratigraphy, and that the orange zone likely developed during the later recovery stages of the Paleocene-Eocene thermal maximum. The Williston Basin records generally agree with the tenet that continental weathering intensified during the Paleocene-Eocene thermal maximum. Moreover, these records indicate that the paleohydrology of the basin varied markedly and that sequestration of terrestrial organic carbon was greatly reduced as this transient global warming event unfolded. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.