Publication Date:
2015-10-03
Description:
Bolide impact and flood volcanism compete as leading candidates for the cause of terminal-Cretaceous mass extinctions. High-precision (40)Ar/(39)Ar data indicate that these two mechanisms may be genetically related, and neither can be considered in isolation. The existing Deccan Traps magmatic system underwent a state shift approximately coincident with the Chicxulub impact and the terminal-Cretaceous mass extinctions, after which ~70% of the Traps' total volume was extruded in more massive and more episodic eruptions. Initiation of this new regime occurred within ~50,000 years of the impact, which is consistent with transient effects of impact-induced seismic energy. Postextinction recovery of marine ecosystems was probably suppressed until after the accelerated volcanism waned.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Renne, Paul R -- Sprain, Courtney J -- Richards, Mark A -- Self, Stephen -- Vanderkluysen, Loyc -- Pande, Kanchan -- New York, N.Y. -- Science. 2015 Oct 2;350(6256):76-8. doi: 10.1126/science.aac7549.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, USA. Department of Earth and Planetary Science, University of California-Berkeley, Berkeley, CA 94720, USA. prenne@bgc.org. ; Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, USA. Department of Earth and Planetary Science, University of California-Berkeley, Berkeley, CA 94720, USA. ; Department of Earth and Planetary Science, University of California-Berkeley, Berkeley, CA 94720, USA. ; Department of Biodiversity, Earth and Environmental Science, Drexel University, Philadelphia, PA 19104, USA. ; Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26430116" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
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Medicine
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Natural Sciences in General
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Physics
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