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Pre-mass extinction decline of latest Permian ammonoids

Wolfgang Kiessling, Martin Schobben, Abbas Ghaderi, Vachik Hairapetian, Lucyna Leda and Dieter Korn
Pre-mass extinction decline of latest Permian ammonoids
Geology (Boulder) (March 2018) 46 (3): 283-286


The devastating end-Permian mass extinction is widely considered to have been caused by large-scale and rapid greenhouse gas release by Siberian magmatism. Although the proximate extinction mechanisms are disputed, there is widespread agreement that a major extinction pulse occurred immediately below the biostratigraphically defined Permian-Triassic boundary. Our statistical analyses of stratigraphic confidence intervals do not comply with a single end-Permian extinction pulse of ammonoids in Iran. High turnover rates and extinction pulses are observed over the last 700 k.y. of the Permian period in two widely separated sections representative of a larger area. Analyses of body sizes and morphological complexity support a gradual decline over the same interval. Similar pre-mass extinction declines and disturbances of the carbon cycle have sometimes been reported from other regions, suggesting a widespread, but often overlooked, environmental deterioration at a global scale, well before the traditional main extinction pulse.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 46
Serial Issue: 3
Title: Pre-mass extinction decline of latest Permian ammonoids
Affiliation: Universitaet Erlangen-Nuernberg, Department of Geography and Geosciences, Erlangen, Germany
Pages: 283-286
Published: 201803
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 2018-041990
Categories: StratigraphyInvertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2018079
Illustration Description: geol. sketch map
N25°00'00" - N39°30'00", E44°00'00" - E63°19'60"
Secondary Affiliation: Museum fuer Naturkunde Berlin, DEU, GermanyFerdowsi University of Mashhad, IRN, IranIslamic Azad University-Isfahan Branch, IRN, Iran
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201810
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