Timing the end-Triassic mass extinction: First on land, then in the sea?

Abstract

Research Article| January 01, 2000 Timing the end-Triassic mass extinction: First on land, then in the sea? József Pálfy; József Pálfy 1Collegium Budapest, Institute for Advanced Study, H-1014 Budapest, Hungary Search for other works by this author on: GSW Google Scholar James K. Mortensen; James K. Mortensen 2Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar Elizabeth S. Carter; Elizabeth S. Carter 3Department of Geology, Portland State University, Portland, Oregon 97207-0751, USA Search for other works by this author on: GSW Google Scholar Paul L. Smith; Paul L. Smith 2Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar Richard M. Friedman; Richard M. Friedman 2Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar Howard W. Tipper Howard W. Tipper 4Geological Survey of Canada, Vancouver, British Columbia V6B 5J3, Canada Search for other works by this author on: GSW Google Scholar Geology (2000) 28 (1): 39–42. https://doi.org/10.1130/0091-7613(2000)28<39:TTEMEF>2.0.CO;2 Article history received: 13 May 1999 rev-recd: 17 Aug 1999 accepted: 02 Sep 1999 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation József Pálfy, James K. Mortensen, Elizabeth S. Carter, Paul L. Smith, Richard M. Friedman, Howard W. Tipper; Timing the end-Triassic mass extinction: First on land, then in the sea?. Geology 2000;; 28 (1): 39–42. doi: https://doi.org/10.1130/0091-7613(2000)28<39:TTEMEF>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 end-Triassic marks one of the five biggest mass extinctions, but current geologic time scales are inadequate for understanding its dynamics. A tuff layer in marine sedimentary rocks encompassing the Triassic-Jurassic transition yielded a U-Pb zircon age of 199.6 ± 0.3 Ma. The dated level is immediately below a prominent change in radiolarian faunas and the last occurrence of conodonts. Additional recently obtained U-Pb ages integrated with ammonoid biochronology confirm that the Triassic Period ended ca. 200 Ma, several million years later than suggested by previous time scales. Published dating of continental sections suggests that the extinction peak of terrestrial plants and vertebrates occurred before 200.6 Ma. The end-Triassic biotic crisis on land therefore appears to have preceded that in the sea by at least several hundred thousand years. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.