Iridium and dinocysts at the Cretaceous-Tertiary boundary on Seymour Island, Antarctica: Implications for the K-T event

Abstract

Research Article| August 01, 1994 Iridium and dinocysts at the Cretaceous-Tertiary boundary on Seymour Island, Antarctica: Implications for the K-T event David H. Elliot; David H. Elliot 1Byrd Polar Research Center and Department of Geological Sciences, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar Rosemary A. Askin; Rosemary A. Askin 2Department of Earth Sciences, University of California, Riverside, California 92521 Search for other works by this author on: GSW Google Scholar Frank T. Kyte; Frank T. Kyte 3Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90024 Search for other works by this author on: GSW Google Scholar William J. Zinsmeister William J. Zinsmeister 4Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47906 Search for other works by this author on: GSW Google Scholar Author and Article Information David H. Elliot 1Byrd Polar Research Center and Department of Geological Sciences, Ohio State University, Columbus, Ohio 43210 Rosemary A. Askin 2Department of Earth Sciences, University of California, Riverside, California 92521 Frank T. Kyte 3Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90024 William J. Zinsmeister 4Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47906 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1994) 22 (8): 675–678. https://doi.org/10.1130/0091-7613(1994)022<0675:IADATC>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation David H. Elliot, Rosemary A. Askin, Frank T. Kyte, William J. Zinsmeister; Iridium and dinocysts at the Cretaceous-Tertiary boundary on Seymour Island, Antarctica: Implications for the K-T event. Geology 1994;; 22 (8): 675–678. doi: https://doi.org/10.1130/0091-7613(1994)022<0675:IADATC>2.3.CO;2 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 A single iridium anomaly (40 times background concentration), correlated with the Cretaceous-Tertiary (K-T) boundary, is present within an interval of unconsolidated glauconitic silty sands in a marine clastic sequence on Seymour Island, Antarctic Peninsula. Dinocysts provide the basis for biostratigraphic identification of a 20-30 cm K-T transitional interval; calcareous microfossils have not been preserved in the glauconitic beds. Dinocysts also record an earliest Danian transgressive event 10 cm above the transition interval. The Ir spike is near the base of the dinocyst transition interval and 30 cm below the flooding horizon. The Seymour Island site, located at a high latitude (63°S) at the end of the Cretaceous, provides no compelling evidence for mass extinction at the K-T boundary. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.