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The Late Eocene Earth—Hothouse, Icehouse, and Impacts

GSA Special Papers

The Late Eocene Earth—Hothouse, Icehouse, and Impacts

Author(s)

Geological Society of America

Volume

452

DOI:

https://doi.org/10.1130/SPE452

Copyright:

© 2009 Geological Society of America

ISBN print:

9780813724522

Publication date:

April 01, 2009

Book Chapter

Stable isotopic response to late Eocene extraterrestrial impacts

Author(s)

Aimee E Pusz

Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA

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Kenneth G Miller

Kenneth G Miller

Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA

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James D Wright

Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA

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Miriam E Katz

Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180, USA

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Benjamin S Cramer

Benjamin S Cramer

Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA

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Dennis V Kent

Department of Earth and Planetary Sciences, Rutgers University, Piscataway, New Jersey 08854, USA, and Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA

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Doi:

https://doi.org/10.1130/2009.2452(06)

Published:

April 01, 2009

We evaluated the age of two Upper Eocene impact ejecta layers (North American microtektites linked to the Chesapeake Bay impact structure and clinopyroxene [cpx] spherules from the Popigai crater) and the global effects of the associated impact events. The reported occurrence of cpx spherules from the Popigai impact structure at South Atlantic ODP Site 1090 within the middle of magnetochron C16n.1n yields a magnetochronologic age of 35.4 Ma. We generated high-resolution stable isotope records at Sites 1090, 612 (New Jersey slope), and Caribbean core RC9-58 that show: (1) a 0.5‰ δ¹³C decrease in bulk-carbonate at Site 1090 coincident...

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