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Roadblocks on the kill curve; testing the Raup hypothesis

C. Wylie Poag
Roadblocks on the kill curve; testing the Raup hypothesis
Palaios (December 1997) 12 (6): 582-590


The documented presence of two large ( approximately 100-km diameter), possibly coeval impact craters of late Eocene age, requires modification of the impact-kill curve proposed by David M. Raup. Though the estimated meteorite size for each crater alone is large enough to have produced considerable global environmental stress, no horizons of mass mortality or pulsed extinction are known to be associated with either crater or their ejecta deposits. Thus, either there is no fixed relationship between extinction magnitude and crater diameter, or a meteorite that would produce a crater of >100-km diameter is required to raise extinction rates significantly above a approximately 5% background level. Both impacts took place approximately 1-2 m.y. before the "Terminal Eocene Event" (=early Oligocene pulsed extinction). Their collective long-term environmental effects, however, may have either delayed that extinction pulse or produced threshold conditions necessary for it to take place.

ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 12
Serial Issue: 6
Title: Roadblocks on the kill curve; testing the Raup hypothesis
Author(s): Poag, C. Wylie
Affiliation: U. S. Geological Survey, Woods Hole, MA, United States
Pages: 582-590
Published: 199712
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 113
Accession Number: 1998-023981
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., sketch maps
N36°55'00" - N39°37'00", W76°32'60" - W75°40'00"
N36°49'60" - N37°40'00", W76°34'60" - W75°30'00"
N38°55'00" - N41°21'00", W75°34'60" - W73°52'60"
N00°00'00" - N75°00'00", W80°00'00" - E20°00'00"
N71°09'00" - N72°04'60", E110°04'60" - E112°19'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 199809
Program Name: USGSOPNon-USGS publications with USGS authors
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