The terrestrial Permian-Triassic boundary event bed is a nonevent

Abstract

Research Article| March 01, 2009 The terrestrial Permian-Triassic boundary event bed is a nonevent Robert A. Gastaldo; Robert A. Gastaldo 11Department of Geology, Colby College, Waterville, Maine 04901, USA Search for other works by this author on: GSW Google Scholar Johann Neveling; Johann Neveling 22Council for Geosciences, Private Bag x112, Silverton, Pretoria 0001, South Africa Search for other works by this author on: GSW Google Scholar C. Kittinger Clark; C. Kittinger Clark 11Department of Geology, Colby College, Waterville, Maine 04901, USA Search for other works by this author on: GSW Google Scholar Sophia S. Newbury Sophia S. Newbury 11Department of Geology, Colby College, Waterville, Maine 04901, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Robert A. Gastaldo 11Department of Geology, Colby College, Waterville, Maine 04901, USA Johann Neveling 22Council for Geosciences, Private Bag x112, Silverton, Pretoria 0001, South Africa C. Kittinger Clark 11Department of Geology, Colby College, Waterville, Maine 04901, USA Sophia S. Newbury 11Department of Geology, Colby College, Waterville, Maine 04901, USA Publisher: Geological Society of America Received: 13 Jun 2008 Revision Received: 15 Oct 2008 Accepted: 16 Oct 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (3): 199–202. https://doi.org/10.1130/G25255A.1 Article history Received: 13 Jun 2008 Revision Received: 15 Oct 2008 Accepted: 16 Oct 2008 First Online: 02 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 Robert A. Gastaldo, Johann Neveling, C. Kittinger Clark, Sophia S. Newbury; The terrestrial Permian-Triassic boundary event bed is a nonevent. Geology 2009;; 37 (3): 199–202. doi: https://doi.org/10.1130/G25255A.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 A unique isochronous interval in the Karoo Basin, South Africa, previously has been interpreted to postdate vertebrate extinction at the Permian-Triassic boundary in the Bethulie area, Lootsberg Pass, and elsewhere. It is demonstrated that the laminated beds, or laminites, in the Bethulie region are stratigraphically indistinct. The heterolithic interval exposed on the Heldenmoed farm is ~8 m below the Bethel farm section, <1 km away. At Lootsberg Pass, the laminated interval is below the Permian-Triassic boundary as defined by vertebrate biostratigraphy, rather than overlying it. Hence, this interval, critical to models of end-Permian mass extinction, is neither isochronous across the basin nor unique. Rather, the lithofacies represents avulsion channel-fill deposits within aggradational landscapes. South African models for the response of terrestrial ecosystems to the perturbation in the marine realm require critical reevaluation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.