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State shift in Deccan volcanism at the Cretaceous-Paleogene boundary, possibly induced by impact

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Title State shift in Deccan volcanism at the Cretaceous-Paleogene boundary, possibly induced by impact
 
Creator RENNE, PR
SPRAIN, CJ
RICHARDS, MA
SELF, S
VANDERKLUYSEN, L
PANDE, K
 
Subject FLOOD-BASALT ERUPTIONS
MASS EXTINCTION
PALEOENVIRONMENTAL IMPLICATIONS
TIME SCALES
TRAP LAVAS
PROVINCE
INDIA
GEOCHEMISTRY
DURATION
FLOWS
 
Description Bolide impact and flood volcanism compete as leading candidates for the cause of terminal-Cretaceous mass extinctions. High-precision Ar-40/Ar-39 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 similar to 70% of the Traps' total volume was extruded in more massive and more episodic eruptions. Initiation of this new regime occurred within similar to 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.
 
Publisher AMER ASSOC ADVANCEMENT SCIENCE
 
Date 2016-01-15T09:48:40Z
2016-01-15T09:48:40Z
2015
 
Type Article
 
Identifier SCIENCE, 350(6256)76-78
0036-8075
1095-9203
http://dx.doi.org/10.1126/science.aac7549
http://dspace.library.iitb.ac.in/jspui/handle/100/18292
 
Language en