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Book Chapter

Fossils and geology of the Greenhorn Cyclothem in the Comanche National Grassland, Colorado

Steve Miller
Steve Miller
Western Interior Paleontological Society, P.O. Box 200011, Denver, Colorado 80220, USA
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January 01, 2013


The Cretaceous Western Interior Seaway experienced several transgressive/regressive cycles during its existence. The Greenhorn Cyclothem, the sixth such cycle, is significant because of the symmetry of deposition, and because of the expression of cyclical climatically influenced deposits within. This field trip will illustrate evidence of both of these cycles.

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Figures & Tables


GSA Field Guide

Classic Concepts and New Directions: Exploring 125 Years of GSA Discoveries in the Rocky Mountain Region

Lon D. Abbott
Lon D. Abbott
Department of Geological Sciences University of Colorado Boulder, Colorado 80305 USA
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Gregory S. Hancock
Gregory S. Hancock
Department of Geology College of William and Mary Williamsburg, Virginia 23187 USA
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Geological Society of America
ISBN electronic:
Publication date:
January 01, 2013



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