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Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis

2007; Geological Society of America; Volume: 35; Issue: 4 Linguagem: Inglês

10.1130/g23117a.1

1943-2682

Thomas Galfetti, Peter A. Hochuli, Arnaud Brayard, Hugo Bucher, Helmut Weissert, Jorunn Os Vigran,

Geological formations and processes

Research Article| April 01, 2007 Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis Thomas Galfetti; Thomas Galfetti 1Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Peter A. Hochuli; Peter A. Hochuli 1Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Arnaud Brayard; Arnaud Brayard 2Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland, and UMR 5125 CNRS, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France Search for other works by this author on: GSW Google Scholar Hugo Bucher; Hugo Bucher 3Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Helmut Weissert; Helmut Weissert 4Department of Earth Science, ETH-Z, 8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Jorunn Os Vigran Jorunn Os Vigran 5Mellomila 2, 7034 Trondheim, Norway Search for other works by this author on: GSW Google Scholar Author and Article Information Thomas Galfetti 1Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland Peter A. Hochuli 1Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland Arnaud Brayard 2Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland, and UMR 5125 CNRS, Université Claude Bernard Lyon 1, 69622 Villeurbanne, France Hugo Bucher 3Paläontologisches Institut, Universität Zürich, 8006 Zürich, Switzerland Helmut Weissert 4Department of Earth Science, ETH-Z, 8092 Zürich, Switzerland Jorunn Os Vigran 5Mellomila 2, 7034 Trondheim, Norway Publisher: Geological Society of America Received: 22 Jun 2006 Revision Received: 18 Oct 2006 Accepted: 18 Oct 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2007) 35 (4): 291–294. https://doi.org/10.1130/G23117A.1 Article history Received: 22 Jun 2006 Revision Received: 18 Oct 2006 Accepted: 18 Oct 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Thomas Galfetti, Peter A. Hochuli, Arnaud Brayard, Hugo Bucher, Helmut Weissert, Jorunn Os Vigran; Smithian-Spathian boundary event: Evidence for global climatic change in the wake of the end-Permian biotic crisis. Geology 2007;; 35 (4): 291–294. doi: https://doi.org/10.1130/G23117A.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 One of the most important carbon cycle perturbations following the end-Permian mass extinction event straddles the Smithian-Spathian boundary (SSB) (Olenekian, Early Triassic). This anomaly is characterized by a prominent positive carbon isotope excursion known from Tethyan marine rocks. Its global significance is established here by a new high paleolatitude record (Spitsbergen). Paleontological evidence, such as Boreal palynological data (Barents Sea, Norway) and global patterns of ammonoid distribution, indicates a synchronous major change in terrestrial and marine ecosystems near the SSB. The reestablishment of highly diverse plant ecosystems, including the rise of woody gymnosperms and decline of the formerly dominating lycopods, is interpreted as an effect of a major climate change. This hypothesis is supported by modeling of ammonoid paleobiogeography, the distribution patterns of which are interpreted as a proxy for sea surface temperatures (SST). The latest Smithian thus appears to have been a time of a warm and equable climate as expressed by an almost flat pole to equator SST gradient. In contrast, the steep Spathian SST gradient suggests latitudinally differentiated climatic conditions. We propose that this drastic climate change and the global carbon cycle perturbation were triggered by a massive end-Smithian CO2 injection. The SSB event could therefore represent one of the causes for stepwise and delayed recovery of marine and terrestrial biotas in the wake of the end-Permian biotic crisis. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.