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End-Cretaceous Mass Extinction and Chicxulub Impact in Texas - SP100

Product Code: ES4100
Series: SEPM Special Publications
Author/Editor: Edited by: Gerta Keller and Thierry Adatte
Publication Date: 01 March 2012
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Description

SEPM Special Publication 100

One of the liveliest, contentious, and long-running scientific debates began over three decades ago with the discovery of an iridium anomaly in a thin clay layer at Gubbio, Italy, that led to the hypothesis that a large impact caused the end-Cretaceous mass extinction. For many scientists the discovery of an impact crater near Chicxulub on Yucatan in 1991 all but sealed the impact-kill hypothesis as proven with the impact as sole cause for the mass extinction. Ever since that time evidence to the contrary has generally been interpreted as an impact-tsunami disturbance. A multi-disciplinary team of researchers has tested this assertion in new cores and a dozen outcrops along the Brazos River, Texas. In this area undisturbed sediments reveal a complete time stratigraphic sequence containing the primary impact spherule ejecta layer in late Maastrichtian claystones deposited about 200-300 thousand years before the mass extinction.

Type: Book
Ten Digit ISBN:
Thirteen Digit ISBN: 978-1-56576-308-1
Publisher: SEPM
Binding: Hardback
Pages: 313
Weight: 1.34 kg

Contents

Dedication to Ronnie and lackie Mullinax of the Brazos Rose Ranch

Preface
GERTA KELLER AND THIERRY ADATTE

The Cretaceous-Tertiary Mass Extinction: Theories and Controversies
GERTA KELLER

Defining the Cretaceous-Tertiary Boundary: A Practical Guide and Return to First Principles
GERTA KELLER

Age and Origin of the Chicxulub Impact and Sandstone Complex, Brazos River, Texas: Evidence from Lithostratigraphy and Sedimentology
THIERRY ADATTE, GERTA KELLER, AND GERALD R. BAUM

Biostratigraphy, Age of Chicxulub Impact, and Depositional Environment of the Brazos River KTB Sequences
GERTA KELLER, SIGAL ABRAMOVICH, T HIERRY ADAT TE, AND ZSOLT BERNER

Maastrichtian Planktic Foraminiferal Biostratigraphy and Paleoenvironment of Brazos River, Falls County, Texas, U.S.A.
SIGAL ABRAMOVICH, GERTA KELLER, ZSOLT BERNER, MATA C YMBALISTA, AND CARMI RAK

Calcareous Nannofossils Across the Cretaceous-Tertiary Boundary at Brazos, Texas, U.s.A.: Extinction and Survivorship, Biostratigraphy, and Paleoecology
ABDEL AZIZTA TAWY

The Distribution of Benthic Foraminifera Across the Cretaceous-Paleogene Boundary in Texas (Brazos River) and Denmark (Stevns Klint)
MALCOLM B. HART, SARAH R. SEARLE, SEA E. FEIST, ANDREW D. LEIGHTO , GREGORY D. PRICE,
CHRISTOPHER W. SMART, AND RICHARD J. TWITCHE T T

Cretaceous-Tertiary Mass Extinction in Marginal and Open Marine Environments: Texas, U.S.A., and Tunisia
GERTA KELLER

Platinum Group Element (pGE) Geochemistry of Brazos Sections, Texas, U.S.A.
BRIAN GERTSCH, GERTA KELLER, THIERRY ADAT TE, AND ZSOLT BERNER

Trace-Element Geochemistry of Brazos Sections, Texas, U.S.A.
BRIAN GERTSCH, GERTA KELLER, T HIERRY ADATTE, AND DAVID BARTELS

The Sandstone Complex in the Brazos Riverbed Section: Geochemical Constraints on Genesis and Depositional Conditions
DIRK MUNSEL, ZSOLT BERNER, and DORIS STÜBEN

Geochemistry of Chicxulub Impact Spherules in the Brazos Riverbed Section, Texas, US.A.
PATRICK U LLRICH, ZSOLT BERNER, AND U TZ KRAMAR

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