The prelude of the end-Permian mass extinction predates a postulated bolide impact |
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Authors: | Hongfu Yin Qinglai Feng Aymon Baud Shucheng Xie Mike J. Benton Xulong Lai David J. Bottjer |
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Affiliation: | (1) State Key Laboratory of Geological Process and Mineral Resources, China University of Geosciences, Wuhan, Hubei, 430074, People’s Repulic of China;(2) Musee Geologique, UNIL-BFSH2, 1015 Lausanne, Switzerland;(3) Laboratory of Biological and Environmental Geology, China University of Geosciences, Wuhan, Hubei, 430074, People’s Repulic of China;(4) Department of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK;(5) Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA |
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Abstract: | The mass extinction at the Permian–Triassic Boundary (PTB) is said to have been abrupt and probably caused by an extraterrestrial impact. However, evidence from the Global Stratotype Section and Point (GSSP) of the base of the Induan at Meishan, China, shows that the biotic crisis began prior to the level, in beds 25 and 26 at which the postulated impact event occurred. Evidence of such an earlier biotic crisis occurs in other sections in South China, and in central and western Tethyan regions. This event is characterized by the extinction of a range of faunas, including corals, deep-water radiolarians, most fusulinids and pseudotirolitid ammonoids, and many Permian brachiopods. In all sections, this extinction level is usually a few decimeters to meters below that of the main mass extinction in the event beds (25 and 26) at Meishan, and their correlatives elsewhere. This earlier extinction event happened before the postulated bolide impact at the level of beds 25 and 26, and constrains interpretation of the mechanisms that brought about this greatest mass extinction. Electronic supplementary material Supplementary material is available in the online version of this article at and is accessible for authorized users. |
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Keywords: | Prelude End-Permian Mass extinction Tethyan South China |
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