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Record Details

Record 63 of 1766
Flood basalts and extinction events
Author and Affiliation:
Stothers, Richard B.(NASA Goddard Inst. for Space Studies, New York, United States)
Abstract: The largest known effusive eruptions during the Cenozoic and Mesozoic Eras, the voluminous flood basalts, have long been suspected as being associated with major extinctions of biotic species. Despite the possible errors attached to the dates in both time series of events, the significance level of the suspected correlation is found here to be 1 percent to 4 percent. Statistically, extinctions lag eruptions by a mean time interval that is indistinguishable from zero, being much less than the average residual derived from the correlation analysis. Oceanic flood basalts, however, must have had a different biological impact, which is still uncertain owing to the small number of known examples and differing physical factors. Although not all continental flood basalts can have produced major extinction events, the noncorrelating eruptions may have led to smaller marine extinction events that terminated at least some of the less catastrophically ending geologic stages. Consequently, the 26 Myr quasi-periodicity seen in major marine extinctions may be only a sampling effect, rather than a manifestation of underlying periodicity.
Publication Date: Jul 09, 1993
Document ID:
19930067226
(Acquired Dec 28, 1995)
Accession Number: 93A51223
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: Geophysical Research Letters; p. p. 1399-1402.; (ISSN 0094-8276); 20; 13
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Inst. for Space Studies; New York, NY, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BASALT; MAGMA; MESOZOIC ERA; PALEOBIOLOGY; CROSS CORRELATION; ERROR ANALYSIS
Imprint And Other Notes: Geophysical Research Letters vol. 20, no. 13 p. 1399-1402. July 9, 1993
Availability Source: Other Sources
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