Earliest Triassic Microbialite Micro- to Megastructures in the Huaying Area of Sichuan Province, South China: Implications for the Nature of Oceanic Conditions after the End-Permian Extinction

Other| October 01, 2003 Earliest Triassic Microbialite Micro- to Megastructures in the Huaying Area of Sichuan Province, South China: Implications for the Nature of Oceanic Conditions after the End-Permian Extinction YOICHI EZAKI; YOICHI EZAKI 1Department of Geosciences, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan, ezaki@sci.osaka-cu.ac.jp Search for other works by this author on: GSW Google Scholar JIANBO LIU; JIANBO LIU 2School of Earth and Space Sciences, Peking University, Haidian, Beijing 100871, China Search for other works by this author on: GSW Google Scholar NATSUKO ADACHI NATSUKO ADACHI 3Department of Geosciences, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information YOICHI EZAKI 1Department of Geosciences, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan, ezaki@sci.osaka-cu.ac.jp JIANBO LIU 2School of Earth and Space Sciences, Peking University, Haidian, Beijing 100871, China NATSUKO ADACHI 3Department of Geosciences, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan Publisher: SEPM Society for Sedimentary Geology Accepted: 06 Jun 2003 First Online: 03 Mar 2017 Online ISSN: 1938-5323 Print ISSN: 0883-1351 Society for Sedimentary Geology PALAIOS (2003) 18 (4-5): 388–402. https://doi.org/10.1669/0883-1351(2003)018<0388:ETMMTM>2.0.CO;2 Article history Accepted: 06 Jun 2003 First Online: 03 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 YOICHI EZAKI, JIANBO LIU, NATSUKO ADACHI; Earliest Triassic Microbialite Micro- to Megastructures in the Huaying Area of Sichuan Province, South China: Implications for the Nature of Oceanic Conditions after the End-Permian Extinction. PALAIOS 2003;; 18 (4-5): 388–402. doi: https://doi.org/10.1669/0883-1351(2003)018<0388:ETMMTM>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 SocietyPALAIOS Search Advanced Search Abstract The end-Permian extinction reflects one of the greatest biotic crises in earth history. Evidence of the event and its aftermath is well preserved in Permian/Triassic transitional strata of Sichuan Province in South China, originally deposited in the western part of the Yangtze epicontinental sea. Lowest Triassic strata (the Hindeodus parvus conodont Zone) lie with apparent conformity on uppermost Permian skeletal packstone and wackestone, and are overlain by deeper subtidal thinly bedded argillaceous lime mudstone. These beds are characterized by thrombolitic mesostructures that exhibit macrostructures of highly variable columnar shapes, showing a distinctive stratigraphic succession in bed form from planar to domed and subspherical forms. Spheroidal and ellipsoidal micritic bodies (30 µm in average diameter) are preserved in clusters and are interpreted as calcified coccoidal microbes. The earliest Triassic thrombolitic columns and masses are considered to have been constructed by vertical and lateral accretion of mesoclots of microbial origin. Even after the end-Permian extinction, microbial formation of carbonates apparently predominated in Sichuan in localized subtidal to intertidal environments.Microbialites that formed immediately after the end-Permian extinction represent not only disaster-related forms in stressed environments, but also space- and time-specific, environmentally induced carbonates that may be related in part to the causal mechanism of extinction and delay of biotic recovery. The microbialite sequences in Sichuan Province, South China provide a glimpse of the pre-existing "background" and following "foreground" microbial world, and hence a window that was open temporarily in the post-extinction interval. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.