Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction

Abstract

Research Article| April 01, 2015 Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction Alex H. Kasprak; Alex H. Kasprak 1Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island 02912, USA Search for other works by this author on: GSW Google Scholar Julio Sepúlveda; Julio Sepúlveda 2Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA *Current Address: Geological Sciences and Institute for Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309, USA. Search for other works by this author on: GSW Google Scholar Rosalyn Price-Waldman; Rosalyn Price-Waldman 1Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island 02912, USA Search for other works by this author on: GSW Google Scholar Kenneth H. Williford; Kenneth H. Williford 3Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA Search for other works by this author on: GSW Google Scholar Shane D. Schoepfer; Shane D. Schoepfer 4Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar James W. Haggart; James W. Haggart 5Geological Survey of Canada–Vancouver, Vancouver, British Columbia V6B 5J3, Canada Search for other works by this author on: GSW Google Scholar Peter D. Ward; Peter D. Ward 6Geology and Geophysics, University of Adelaide, Adelaide, South Australia 5005, Australia Search for other works by this author on: GSW Google Scholar Roger E. Summons; Roger E. Summons 2Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Search for other works by this author on: GSW Google Scholar Jessica H. Whiteside Jessica H. Whiteside † 7Ocean and Earth Sciences, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK †E-mail: J.Whiteside@soton.ac.uk Search for other works by this author on: GSW Google Scholar Author and Article Information Alex H. Kasprak 1Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island 02912, USA Julio Sepúlveda *Current Address: Geological Sciences and Institute for Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309, USA. 2Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Rosalyn Price-Waldman 1Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island 02912, USA Kenneth H. Williford 3Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA Shane D. Schoepfer 4Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA James W. Haggart 5Geological Survey of Canada–Vancouver, Vancouver, British Columbia V6B 5J3, Canada Peter D. Ward 6Geology and Geophysics, University of Adelaide, Adelaide, South Australia 5005, Australia Roger E. Summons 2Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Jessica H. Whiteside † 7Ocean and Earth Sciences, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK †E-mail: J.Whiteside@soton.ac.uk Publisher: Geological Society of America Received: 20 Oct 2014 Revision Received: 12 Jan 2015 Accepted: 22 Jan 2015 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2015 Geological Society of America Geology (2015) 43 (4): 307–310. https://doi.org/10.1130/G36371.1 Article history Received: 20 Oct 2014 Revision Received: 12 Jan 2015 Accepted: 22 Jan 2015 First Online: 09 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 Alex H. Kasprak, Julio Sepúlveda, Rosalyn Price-Waldman, Kenneth H. Williford, Shane D. Schoepfer, James W. Haggart, Peter D. Ward, Roger E. Summons, Jessica H. Whiteside; Episodic photic zone euxinia in the northeastern Panthalassic Ocean during the end-Triassic extinction. Geology 2015;; 43 (4): 307–310. doi: https://doi.org/10.1130/G36371.1 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 Severe changes in ocean redox, nutrient cycling, and marine productivity accompanied most Phanerozoic mass extinctions. However, evidence for marine photic zone euxinia (PZE) as a globally important extinction mechanism for the end-Triassic extinction (ETE) is currently lacking. Fossil molecular (biomarker) and nitrogen isotopic records from a sedimentary sequence in western Canada provide the first conclusive evidence of PZE and disrupted biogeochemistry in neritic waters of the Panthalassic Ocean during the end Triassic. Increasing water-column stratification and deoxygenation across the ETE led to PZE in the Early Jurassic, paralleled by a perturbed nitrogen cycle and ecological turnovers among noncalcifying groups, including eukaryotic algae and prokaryotic plankton. If such conditions developed widely in the Panthalassic Ocean, PZE might have been a potent mechanism for the ETE. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.