On impact and volcanism across the Cretaceous-Paleogene boundary.

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ID: 84812
2020
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Abstract
The cause of the end-Cretaceous mass extinction is vigorously debated, owing to the occurrence of a very large bolide impact and flood basalt volcanism near the boundary. Disentangling their relative importance is complicated by uncertainty regarding kill mechanisms and the relative timing of volcanogenic outgassing, impact, and extinction. We used carbon cycle modeling and paleotemperature records to constrain the timing of volcanogenic outgassing. We found support for major outgassing beginning and ending distinctly before the impact, with only the impact coinciding with mass extinction and biologically amplified carbon cycle change. Our models show that these extinction-related carbon cycle changes would have allowed the ocean to absorb massive amounts of carbon dioxide, thus limiting the global warming otherwise expected from postextinction volcanism.
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hull2020onscience Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Hull, Pincelli M;Bornemann, André;Penman, Donald E;Henehan, Michael J;Norris, Richard D;Wilson, Paul A;Blum, Peter;Alegret, Laia;Batenburg, Sietske J;Bown, Paul R;Bralower, Timothy J;Cournede, Cecile;Deutsch, Alexander;Donner, Barbara;Friedrich, Oliver;Jehle, Sofie;Kim, Hojung;Kroon, Dick;Lippert, Peter C;Loroch, Dominik;Moebius, Iris;Moriya, Kazuyoshi;Peppe, Daniel J;Ravizza, Gregory E;Röhl, Ursula;Schueth, Jonathan D;Sepúlveda, Julio;Sexton, Philip F;Sibert, Elizabeth C;Śliwińska, Kasia K;Summons, Roger E;Thomas, Ellen;Westerhold, Thomas;Whiteside, Jessica H;Yamaguchi, Tatsuhiko;Zachos, James C;
Journal science (new york, ny)
Year 2020
DOI
10.1126/science.aay5055
URL
Keywords
diversity microorganisms asphalt seep deep-sea sediment são paulo plateau

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