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On impact and volcanism across the Cretaceous-Paleogene boundary

On impact and volcanism across the Cretaceous-Paleogene boundary
On impact and volcanism across the Cretaceous-Paleogene boundary
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.
0036-8075
266-272
Hull, Pincelli M.
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Bornemann, André
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Penman, Donald E.
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Henehan, Michael J.
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Norris, Richard D.
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Wilson, Paul A.
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Blum, Peter
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Alegret, Laia
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Batenburg, Sietske J.
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Bown, Paul R.
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Bralower, Timothy J.
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Cournede, Cecile
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Deutsch, Alexander
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Donner, Barbara
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Friedrich, Oliver
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Jehle, Sofie
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Kim, Hojung
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Kroon, Dick
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Lippert, Peter C.
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Loroch, Dominik
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Moebius, Iris
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Moriya, Kazuyoshi
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Peppe, Daniel J.
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Ravizza, Gregory E.
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Röhl, Ursula
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Schueth, Jonathan D.
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Sepúlveda, Julio
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Sexton, Philip F.
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Sibert, Elizabeth C.
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Śliwińska, Kasia K.
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Summons, Roger E.
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Thomas, Ellen
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Westerhold, Thomas
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Whiteside, Jessica H.
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Yamaguchi, Tatsuhiko
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Zachos, James C.
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Hull, Pincelli M.
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Bornemann, André
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Penman, Donald E.
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Henehan, Michael J.
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Norris, Richard D.
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Bown, Paul R.
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Cournede, Cecile
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Deutsch, Alexander
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Donner, Barbara
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Friedrich, Oliver
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Jehle, Sofie
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Kroon, Dick
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Lippert, Peter C.
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Loroch, Dominik
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Moebius, Iris
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Peppe, Daniel J.
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Ravizza, Gregory E.
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Röhl, Ursula
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Schueth, Jonathan D.
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Śliwińska, Kasia K.
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Summons, Roger E.
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Thomas, Ellen
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Westerhold, Thomas
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Whiteside, Jessica H.
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Yamaguchi, Tatsuhiko
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Zachos, James C.
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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 and Zachos, James C. (2020) On impact and volcanism across the Cretaceous-Paleogene boundary. Science, 367 (6475), 266-272. (doi:10.1126/science.aay5055).

Record type: Article

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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ImpactVolcanism_revision_ver12 - Accepted Manuscript
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Accepted/In Press date: 5 December 2019
e-pub ahead of print date: 17 January 2020
Published date: 17 January 2020

Identifiers

Local EPrints ID: 438142
URI: http://eprints.soton.ac.uk/id/eprint/438142
ISSN: 0036-8075
PURE UUID: 39570988-31b2-4fb8-9e7b-2706e7d20fad

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Date deposited: 03 Mar 2020 17:31
Last modified: 07 Oct 2020 04:15

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Contributors

Author: Pincelli M. Hull
Author: André Bornemann
Author: Donald E. Penman
Author: Michael J. Henehan
Author: Richard D. Norris
Author: Paul A. Wilson
Author: Peter Blum
Author: Laia Alegret
Author: Sietske J. Batenburg
Author: Paul R. Bown
Author: Timothy J. Bralower
Author: Cecile Cournede
Author: Alexander Deutsch
Author: Barbara Donner
Author: Oliver Friedrich
Author: Sofie Jehle
Author: Hojung Kim
Author: Dick Kroon
Author: Peter C. Lippert
Author: Dominik Loroch
Author: Iris Moebius
Author: Kazuyoshi Moriya
Author: Daniel J. Peppe
Author: Gregory E. Ravizza
Author: Ursula Röhl
Author: Jonathan D. Schueth
Author: Julio Sepúlveda
Author: Philip F. Sexton
Author: Elizabeth C. Sibert
Author: Kasia K. Śliwińska
Author: Roger E. Summons
Author: Ellen Thomas
Author: Thomas Westerhold
Author: Tatsuhiko Yamaguchi
Author: James C. Zachos

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