Extinction Patterns, Δ18 O Trends, and Magnetostratigraphy from a Southern High-Latitude Cretaceous–Paleogene Section: Links with Deccan Volcanism
Palaeogeography, Palaeoclimatology, Palaeoecology 350–352 (2012) 180–188 Contents lists available at SciVerse ScienceDirect Palaeogeography, Palaeoclimatology, Palaeoecology journal homepage: www.elsevier.com/locate/palaeo Extinction patterns, δ18 O trends, and magnetostratigraphy from a southern high-latitude Cretaceous–Paleogene section: Links with Deccan volcanism Thomas S. Tobin a,⁎, Peter D. Ward a, Eric J. Steig a, Eduardo B. Olivero b, Isaac A. Hilburn c, Ross N. Mitchell d, Matthew R. Diamond c, Timothy D. Raub e, Joseph L. Kirschvink c a University of Washington, Earth and Space Sciences, Box 351310, Seattle WA 98195, United States b CADIC-CONICET, Bernardo Houssay, V9410CAB, Ushuaia, Tierra del Fuego, Argentina c California Institute of Technology, Geological and Planetary Sciences, 1200 E. California Blvd. Pasadena CA 91125, United States d Yale University, Geology & Geophysics, 230 Whitney Ave. New Haven, CT 06511, United States e University of St. Andrews, Department of Earth Sciences, St. Andrews KY16 9AL, UK article info abstract Article history: Although abundant evidence now exists for a massive bolide impact coincident with the Cretaceous–Paleogene Received 19 April 2012 (K–Pg) mass extinction event (~65.5 Ma), the relative importance of this impact as an extinction mechanism is Received in revised form 27 May 2012 still the subject of debate. On Seymour Island, Antarctic Peninsula, the López de Bertodano Formation yields one Accepted 8 June 2012 of the most expanded K–Pg boundary sections known. Using a new chronology from magnetostratigraphy, and Available online 10 July 2012 isotopic data from carbonate-secreting macrofauna, we present a high-resolution, high-latitude paleotemperature record spanning this time interval.
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