The prelude of the end-Permian mass extinction predates a postulated bolide impact

Details

Serval ID
serval:BIB_85E040EC546B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The prelude of the end-Permian mass extinction predates a postulated bolide impact
Journal
International Journal of Earth Sciences
Author(s)
Yin H., Feng Q., Baud A., Xie S., Benton M.J., Lai X., Bottjer D.J.
ISSN
1437-3262
Publication state
Published
Issued date
2007
Peer-reviewed
Oui
Volume
96
Pages
903-909
Language
english
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 pseudotirolitidammonoids, 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.
Keywords
Prelude End-Permian Mass-extinction Tethyan South China
Web of science
Create date
20/02/2009 19:04
Last modification date
20/08/2019 14:45
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