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Pleistocene convolutions near city springs of Laramie, Wyoming

Michael D. Fenton and M. R. Voorhies
Pleistocene convolutions near city springs of Laramie, Wyoming
Contributions to Geology (1965) 4 (2): 81-84


Highly contorted siltstone strata of the Satanka Formation (Permian) are exposed in a stream bank northeast of Laramie, Wyo. Overlying the Satanka at this locality are Pleistocene fluviatile sediments (several lenses of sand and a bed of cobbles) which are also involved in the convolutions. In contrast with most previously described Pleistocene convolutions, those discussed herein show a pronounced directionality. The folds are asymmetrical with their steep limbs dipping southwest and many are overturned in the same direction. Although these features may have formed under periglacial conditions, a simple freeze-thaw mechanism is insufficient to account for their configuration. Deposition of the overlying load of cobbles on an unstable slope may well have induced the deformation.

ISSN: 0010-7980
Serial Title: Contributions to Geology
Serial Volume: 4
Serial Issue: 2
Title: Pleistocene convolutions near city springs of Laramie, Wyoming
Pages: 81-84
Published: 1965
Text Language: English
Publisher: University of Wyoming, Laramie, WY, United States
Accession Number: 1965-016365
Categories: Structural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N41°00'00" - N45°00'00", W111°04'60" - W104°04'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1965
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