Arctic dinoflagellate migrations mark the strongest Oligocene glaciations

Abstract

Research Article| September 01, 2005 Arctic dinoflagellate migrations mark the strongest Oligocene glaciations Stefaan Van Simaeys; Stefaan Van Simaeys 1Historical Geology, University of Leuven, Redingenstraat 16, B-3000 Leuven, Belgium Search for other works by this author on: GSW Google Scholar Henk Brinkhuis; Henk Brinkhuis 2Department of Palaeoecology, Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands Search for other works by this author on: GSW Google Scholar Jörg Pross; Jörg Pross 3Institute of Geology and Paleontology, J.W. Goethe University Frankfurt, Senckenberganlage 32-34, D-60054 Frankfurt, Germany Search for other works by this author on: GSW Google Scholar Graham L. Williams; Graham L. Williams 4Geological Survey of Canada (Atlantic), Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth NS B2Y 4A2, Canada Search for other works by this author on: GSW Google Scholar James C. Zachos James C. Zachos 5University of California–Santa Cruz, Earth Science Department, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Stefaan Van Simaeys 1Historical Geology, University of Leuven, Redingenstraat 16, B-3000 Leuven, Belgium Henk Brinkhuis 2Department of Palaeoecology, Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands Jörg Pross 3Institute of Geology and Paleontology, J.W. Goethe University Frankfurt, Senckenberganlage 32-34, D-60054 Frankfurt, Germany Graham L. Williams 4Geological Survey of Canada (Atlantic), Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth NS B2Y 4A2, Canada James C. Zachos 5University of California–Santa Cruz, Earth Science Department, Santa Cruz, California 95064, USA Publisher: Geological Society of America Received: 18 Feb 2005 Revision Received: 02 May 2005 Accepted: 03 May 2005 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2005) 33 (9): 709–712. https://doi.org/10.1130/G21634.1 Article history Received: 18 Feb 2005 Revision Received: 02 May 2005 Accepted: 03 May 2005 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Stefaan Van Simaeys, Henk Brinkhuis, Jörg Pross, Graham L. Williams, James C. Zachos; Arctic dinoflagellate migrations mark the strongest Oligocene glaciations. Geology 2005;; 33 (9): 709–712. doi: https://doi.org/10.1130/G21634.1 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 Here we report on mid-Oligocene globally synchronous Arctic dinoflagellate migration events, calibrated against chron C9n. We show that sudden appearances and marked abundance increases of the Arctic taxon Svalbardella at lower and middle latitudes coincide with the Oi-2b benthic δ18O glacial episode, dated as ca. 27.1 Ma. These unprecedented migrations are taken to indicate anomalously strong surface-water cooling during Oi-2b time, in turn associated with strong concomitant Antarctic ice-sheet growth and sea-level lowering. We estimate the duration of these unique Svalbardella migrations and the associated episode of profound cooling as ∼500 k.y. Our records suggest a close link between this distinct Oligocene glaciation episode, strong sea-level fall, and the classic lower-upper Oligocene, or Rupelian-Chattian, boundary, dating this boundary as ca. 27.1 Ma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.