Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula

Abstract

Research Article| May 01, 2006 Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula Linda C. Ivany; Linda C. Ivany 1Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Stefaan Van Simaeys; Stefaan Van Simaeys 2Historical Geology, University of Leuven, Leuven B-3000, Belgium Search for other works by this author on: GSW Google Scholar Eugene W. Domack; Eugene W. Domack 3Department of Geosciences, Hamilton College, Clinton, New York 13323, USA Search for other works by this author on: GSW Google Scholar Scott D. Samson Scott D. Samson 4Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Linda C. Ivany 1Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Stefaan Van Simaeys 2Historical Geology, University of Leuven, Leuven B-3000, Belgium Eugene W. Domack 3Department of Geosciences, Hamilton College, Clinton, New York 13323, USA Scott D. Samson 4Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Publisher: Geological Society of America Received: 30 Nov 2005 Revision Received: 19 Dec 2005 Accepted: 22 Dec 2005 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2006) 34 (5): 377–380. https://doi.org/10.1130/G22383.1 Article history Received: 30 Nov 2005 Revision Received: 19 Dec 2005 Accepted: 22 Dec 2005 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Linda C. Ivany, Stefaan Van Simaeys, Eugene W. Domack, Scott D. Samson; Evidence for an earliest Oligocene ice sheet on the Antarctic Peninsula. Geology 2006;; 34 (5): 377–380. doi: https://doi.org/10.1130/G22383.1 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 SocietyGeology Search Advanced Search Abstract There is growing consensus that development of a semipermanent ice sheet on Antarctica began at or near the Eocene-Oligocene (E-O) boundary. Beyond ice-rafted debris in oceanic settings, however, direct evidence for a substantial ice sheet at this time has been limited and thus far restricted to East Antarctica. It is unclear where glacier ice first accumulated and how extensive it was on the Antarctic continent in the earliest Oligocene. Sediments at the top of the Eocene marine shelf section on Seymour Island, Antarctic Peninsula, include glacial marine deposits and a lodgment till with clasts derived from a variety of rock units on the peninsula. Dinoflagellate biostratigraphy and strontium isotope stratigraphy indicate an age at or very close to the E-O boundary. Glacier ice extending to sea level in the northern peninsula at this time suggests the presence of a regionally extensive West Antarctica ice sheet, and thus an even more dramatic response to the forcing factors that facilitated high-latitude ice expansion in the earliest Oligocene. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.