doi: 10.1126/science.aav1446.
The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary
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- PMID:30792301
- DOI: 10.1126/science.aav1446
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The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary
Courtney J Sprain et al. Science..
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Abstract
Late Cretaceous records of environmental change suggest that Deccan Traps (DT) volcanism contributed to the Cretaceous-Paleogene boundary (KPB) ecosystem crisis. However, testing this hypothesis requires identification of the KPB in the DT. We constrain the location of the KPB with high-precision argon-40/argon-39 data to be coincident with changes in the magmatic plumbing system. We also found that the DT did not erupt in three discrete large pulses and that >90% of DT volume erupted in <1 million years, with ~75% emplaced post-KPB. Late Cretaceous records of climate change coincide temporally with the eruption of the smallest DT phases, suggesting that either the release of climate-modifying gases is not directly related to eruptive volume or DT volcanism was not the source of Late Cretaceous climate change.
Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
Comment in
- Deciphering mass extinction triggers.Burgess S.Burgess S.Science. 2019 Feb 22;363(6429):815-816. doi: 10.1126/science.aaw0473.Science. 2019.PMID:30792290No abstract available.
- Why we can't get over the death of the dinosaurs.[No authors listed][No authors listed]Nature. 2019 Apr;568(7751):143. doi: 10.1038/d41586-019-01096-8.Nature. 2019.PMID:30971844No abstract available.
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