Anoxic events in the late Frasnian—Causes of the Frasnian-Famennian faunal crisis?

Research Article| August 01, 1993 Anoxic events in the late Frasnian—Causes of the Frasnian-Famennian faunal crisis? Michael M. Joachimski; Michael M. Joachimski 1Department of Geology, University of Erlangen, 8520 Erlangen, Germany Search for other works by this author on: GSW Google Scholar Werner Buggisch Werner Buggisch 1Department of Geology, University of Erlangen, 8520 Erlangen, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Michael M. Joachimski 1Department of Geology, University of Erlangen, 8520 Erlangen, Germany Werner Buggisch 1Department of Geology, University of Erlangen, 8520 Erlangen, Germany Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (8): 675–678. https://doi.org/10.1130/0091-7613(1993)021<0675:AEITLF>2.3.CO;2 Article history 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 Michael M. Joachimski, Werner Buggisch; Anoxic events in the late Frasnian—Causes of the Frasnian-Famennian faunal crisis?. Geology 1993;; 21 (8): 675–678. doi: https://doi.org/10.1130/0091-7613(1993)021<0675:AEITLF>2.3.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 Carbon isotope data collected from five Frasnian-Famennian boundary sections in central Europe show two positive δ13C excursions in the late Frasnian (∼367 Ma). Both anomalies coincided with the deposition of the bituminous lower and upper Kellwasser horizons. The carbon isotope patterns indicate two phases of enhanced burial and subsequent recycling of organic carbon. A maximum formation of warm saline waters on the subtropical to tropical epicontinental shelves during late Frasnian transgressive episodes may have induced oceanic oxygen deficits. Variations in the Corg burial rates may have resulted in changes in the CO2 concentrations in the oceans and in the atmosphere, culminating in global climatic changes. We propose that the repeated co-occurrences of sea-level fluctuations, anoxic conditions, and global climatic changes during the late Frasnian would affect especially the subtropical to tropical shallow-water communities and reef ecosystems, which were severely affected during the Frasnian-Famennian faunal crisis. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.