Journal
SCIENCE
Volume 363, Issue 6429, Pages 866-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aav1446
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Funding
- Ann and Gordon Getty Foundation
- Esper S. Larsen Fund of the University of California, Berkeley
- Heising-Simons Foundation
- NSF [EAR-1615021, EAR-1615203, EAR-1615003]
- Berkeley Geochronology Center
- NSF graduate research fellowship
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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 similar to 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.
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