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On the backs of giants: Geology of the Kentland impact structure, Newton County (Kentland) Quarry, Indiana (USA)—Building on Ray Gutschick’s legacy

By
John C. Weber*
John C. Weber*
Department of Geology, Grand Valley State University, Allendale, Michigan 49401, USA
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R. Douglas Elmore
R. Douglas Elmore
School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma, USA
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Christina Hamilton
Christina Hamilton
School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma, USA
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Andrew Alder
Andrew Alder
Department of Geology, Grand Valley State University, Allendale, Michigan 49401, USA
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Christian Koeberl
Christian Koeberl
Department of Lithospheric Research, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria, and Natural History Museum, Burgring 7, A-1010 Vienna, Austria
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Mike Pope
Mike Pope
Department of Geology and Geophysics, Texas A&M University, College Station, Texas 77843-3115, USA
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Published:
December 10, 2018
Publication history
04 September 2018

“…the frustration of discovering an unusually good exposure or feature only to have it quarried or covered in succeeding weeks is disheartening. On the other hand, quarry advance enables one to project the geology from time to time, which helps one to fill in the three-dimensional puzzle.”

Gutschick (1972)

ABSTRACT

We summarize and then build on the three decades of geological mapping and analyses done by Ray Gutschick at the Newton County (Kentland) quarry. We present our own new data and ideas on the kinematics and significance of radial faults, shock metamorphism, petrography and diagenesis of impact breccia dikes, impactite geochemistry, and a preliminary new paleomagnetically determined Jurassic age for the crater. We list and describe the stops for this field excursion.

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Contents

GSA Special Papers

Ancient Oceans, Orogenic Uplifts, and Glacial Ice: Geologic Crossroads in America’s Heartland

Lee J. Florea
Lee J. Florea
Indiana Geological and Water Survey Indiana University 611 N. Walnut Grove Avenue Bloomington, Indiana 47405, USA
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Geological Society of America
Volume
51
ISBN electronic:
9780813756516
Publication date:
December 10, 2018

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