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Neoproterozoic glacial record in the Death Valley region,California and Nevada

By
Mark Abolins
Mark Abolins
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125 USA,
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Rebecca Oskin
Rebecca Oskin
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125 USA,
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Tony Prave
Tony Prave
School of Geography and Geosciences, University of St. Andrews, St. Andrews, Fife, KY16 9ST, Scotland
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Catherine Summa
Catherine Summa
Department of Geology, Winona State University, Winona, Minnesota 55987 USA
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Frank Corsetti
Frank Corsetti
Department of Geological Sciences, University of California, Santa Barbara, California 93106 USA
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Published:
January 01, 2000

Abstract

The Neoproterozoic succession in the Death Valley region contains a physical-and chemo-stratigraphic record of glaciation. Direct evidence for glaciation includes dropstones, glacially influenced diamictites, and cap carbonates in the Neoproterozoic Kingston Peak Formation. Within this formation, glacially influenced deposits and cap carbonates occur at two distinct horizons, suggesting at least two glacial episodes. Cap-like carbonates and sequence boundaries elsewhere in the succession may indicate additional glacial intervals. The basal Beck Spring Dolomite has facies and isotopic characteristics commonly associated with cap carbonates, and the rest of the succession is punctuated by numerous sequence boundaries including a prominent incised horizon in the uppermost Johnnie Formation. This horizon is locally overlain by carbonate with cap-like facies and isotopic characteristics. Together, these observations indicate at least two and possibly four distinct Neoproterozoic glaciations.

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GSA Field Guide

Great Basin and Sierra Nevada

David R. Lageson
David R. Lageson
Department of Earth Sciences Montana State University Bozeman, MT 59717 USA
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Stephen G. Peters
Stephen G. Peters
Reno Field Office Mackay School of Mines, MS-176 University of Nevada Reno, Nevada 89557-0047 USA
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Mary M. Lahren
Mary M. Lahren
Department of Geological Sciences MS-l72 University of Nevada Reno, Nevada 89557 USA 2000
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Geological Society of America
Volume
2
ISBN electronic:
9780813756028
Publication date:
January 01, 2000

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