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Extinction patterns, δ^(18) O trends, and magnetostratigraphy from a southern high-latitude Cretaceous–Paleogene section: Links with Deccan volcanism

Tobin, Thomas S. and Ward, Peter D. and Steig, Eric J. and Olivero, Eduardo B. and Hilburn, Isaac A. and Mitchell, Ross N. and Diamond, Matthew R. and Raub, Timothy D. and Kirschvink, Joseph L. (2012) Extinction patterns, δ^(18) O trends, and magnetostratigraphy from a southern high-latitude Cretaceous–Paleogene section: Links with Deccan volcanism. Palaeogeography, Palaeoclimatology, Palaeoecology, 350-352 . pp. 180-188. ISSN 0031-0182. https://resolver.caltech.edu/CaltechAUTHORS:20121030-150317203

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Abstract

Although abundant evidence now exists for a massive bolide impact coincident with the Cretaceous–Paleogene (K–Pg) mass extinction event (~ 65.5 Ma), the relative importance of this impact as an extinction mechanism is still the subject of debate. On Seymour Island, Antarctic Peninsula, the López de Bertodano Formation yields one of the most expanded K–Pg boundary sections known. Using a new chronology from magnetostratigraphy, and isotopic data from carbonate-secreting macrofauna, we present a high-resolution, high-latitude paleotemperature record spanning this time interval. We find two prominent warming events synchronous with the three main phases of Deccan Traps flood volcanism, and the onset of the second is contemporaneous with a local extinction that pre-dates the bolide impact. What has been termed the K–Pg extinction is potentially the sum of multiple, independent events, at least at high latitudes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.palaeo.2012.06.029DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S0031018212003847PublisherUNSPECIFIED
ORCID:
AuthorORCID
Tobin, Thomas S.0000-0003-0992-7809
Raub, Timothy D.0000-0002-7471-0246
Kirschvink, Joseph L.0000-0001-9486-6689
Additional Information:© 2012 Elsevier B.V. Received 19 April 2012. Received in revised form 27 May 2012. Accepted 8 June 2012. Available online 10 July 2012. We thank Dr. Isern and Dr. Borg of NSF Polar Programs for grants OPP-0739541 (PI Kirschvink) and OPP-0739432 (PI's Ward and Steig). We also acknowledge funding from PICTO 36315 and 0114 ANPCyT-DNA (Olivero). We thank two anonymous reviewers for their comments which improved the manuscript. We would also like to thank David J. Smith, Alvar Sobral, Tomás Wagener, Melissa Rider, Stian Alesandrini, John Evans, Dave Barbeau, Andrew Schauer, and Ron Sletten for assistance in the field and laboratory. Magnetostratigraphic data for this paper are available in the supplemental online material and at the MagIC portal, and the isotopic data is available as a supplemental data set and on the UW Isolab website (http://depts.washington.edu/isolab/data/). Fossil material is held at the University of Washington's Burke Museum of Natural History.
Funders:
Funding AgencyGrant Number
NSF Polar ProgramsOPP-0739541
NSF Polar ProgramsOPP-0739432
PICTO36315
ANPCyT-DNA0114
Subject Keywords:Mass extinction; K–Pg; Paleotemperature; Magnetostratigraphy; Antarctica; Deccan Traps
Record Number:CaltechAUTHORS:20121030-150317203
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20121030-150317203
Official Citation:Thomas S. Tobin, Peter D. Ward, Eric J. Steig, Eduardo B. Olivero, Isaac A. Hilburn, Ross N. Mitchell, Matthew R. Diamond, Timothy D. Raub, Joseph L. Kirschvink, Extinction patterns, δ18 O trends, and magnetostratigraphy from a southern high-latitude Cretaceous–Paleogene section: Links with Deccan volcanism, Palaeogeography, Palaeoclimatology, Palaeoecology, Volumes 350–352, 15 September 2012, Pages 180-188, ISSN 0031-0182, 10.1016/j.palaeo.2012.06.029. (http://www.sciencedirect.com/science/article/pii/S0031018212003847)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35186
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:30 Oct 2012 22:26
Last Modified:09 Mar 2020 13:19

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