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Timing of mammal-like reptile extinctions across the Permian-Triassic boundary in South Africa

2000; Geological Society of America; Volume: 28; Issue: 3 Linguagem: Inglês

10.1130/0091-7613(2000)28 2.0.co;2

1943-2682

Kenneth G. MacLeod, Roger M. H. Smith, Paul L. Koch, Peter D. Ward,

Paleontology and Evolutionary Biology

Research Article| March 01, 2000 Timing of mammal-like reptile extinctions across the Permian-Triassic boundary in South Africa Kenneth G. MacLeod; Kenneth G. MacLeod 1Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA Search for other works by this author on: GSW Google Scholar Roger M. H. Smith; Roger M. H. Smith 2South African Museum, P.O. Box 61, 8000 Cape Town, South Africa Search for other works by this author on: GSW Google Scholar Paul L. Koch; Paul L. Koch 3Earth Sciences Department, University of California, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Peter D. Ward Peter D. Ward 4Department of Geological Sciences, Box 351310, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Kenneth G. MacLeod 1Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA Roger M. H. Smith 2South African Museum, P.O. Box 61, 8000 Cape Town, South Africa Paul L. Koch 3Earth Sciences Department, University of California, Santa Cruz, California 95064, USA Peter D. Ward 4Department of Geological Sciences, Box 351310, University of Washington, Seattle, Washington 98195, USA Publisher: Geological Society of America Received: 21 Jun 1999 Revision Received: 16 Nov 1999 Accepted: 24 Nov 1999 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (3): 227–230. https://doi.org/10.1130/0091-7613(2000)28 2.0.CO;2 Article history Received: 21 Jun 1999 Revision Received: 16 Nov 1999 Accepted: 24 Nov 1999 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Kenneth G. MacLeod, Roger M. H. Smith, Paul L. Koch, Peter D. Ward; Timing of mammal-like reptile extinctions across the Permian-Triassic boundary in South Africa. Geology 2000;; 28 (3): 227–230. doi: https://doi.org/10.1130/0091-7613(2000)28 2.0.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 The rate, timing, and pattern of change in different regions and paleoenvironments are critical for distinguishing among potential causes for the Permian-Triassic (P-T) extinction. Carbon isotopic stratigraphy can provide global chronostratigraphic control. We report a large δ13C excursion at the P-T boundary and no long-term Permian δ13C trends for samples from the interior of Pangea. Stratigraphic gaps between available samples limit the resolution of our δ13C curve, but the excursion is within a 15-m-thick zone of overlap between Permian and Triassic taxa. Sedimentological and taphonomic observations demonstrate that this 15 m interval does not represent geologically instantaneous deposition. Together these data support a rapid and globally synchronous P-T event, but suggest that it occurred over a geologically resolvable interval of time. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.