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Evidence for Orbitally-Driven Sedimentary Cycles in the Devonian Catskill Delta Complex

By
Jay Van Tassell
Jay Van Tassell
Science Department, Eastern Oregon State College, La Grande, Oregon 97850
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Published:
January 01, 1994

Abstract

Recent computer climate modeling has revealed possible mechanisms which allow Milankovitch orbital parameters to influence climate and sedimentation in tropical areas with monsoonal climates such as the setting of the Devonian Catskill Delta complex of the Appalachians. There is evidence that the shoreline, shelf, slope, and basin sediments of the Catskill Delta complex contain sedimentary cycles with depositional periods of approximately 1-3 ka, 20-40 ka, 100 ka, 400 ka, and, possibly, 1.3, 2.0 and 3.5 Ma, which may be related to orbital precession, obliquity and eccentricity cycles, plus harmonics of these forcing periods. Preliminary correlations suggest that at least some of these rhythms may be traceable throughout the Appalachian basin and some may be of global extent. Until more complete age-dating and improved stratigraphic correlation becomes available, the synchronism of these events will remain unproven.

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Contents

SEPM Concepts in Sedimentology and Paleontology

Tectonic and Eustatic Controls on Sedimentary Cycles

John M. Dennison
John M. Dennison
University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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Frank R. Ettensohn
Frank R. Ettensohn
University of Kentucky, Lexington, Kentucky
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SEPM Society for Sedimentary Geology
Volume
4
ISBN electronic:
9781565762275
Publication date:
January 01, 1994

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