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GEOREF RECORD

Basement response to the Laramide orogeny at Coad Mountain, Wyoming

Charles W. Barnes and Robert S. Houston
Basement response to the Laramide orogeny at Coad Mountain, Wyoming
Contributions to Geology (1969) 8 (1): 37-41

Abstract

A major problem in the controversial Laramide orogeny is understanding the mechanism whereby seemingly brittle gneisses of the Precambrian basement take almost the exact configuration of folds developed in overlying sedimentary cover, well exposed in the Medicine Bow Mts. Detailed study of Coad Mountain suggests that basement folding under relatively low load pressures might take place through passive folding along microfractures parallel to joints when the basement is once again placed in a stress field. The folding mechanism by which sedimentary veneer and basement mutually form a congruent fold surface remains a mystery. One consistent pattern is the reflection of Precambrian faults in younger fault systems; folds seem to be independent of Precambrian structures. Possibly the Laramide fold axis is perpendicular to a Precambrian lineation.


ISSN: 0010-7980
Coden: WUGGAO
Serial Title: Contributions to Geology
Serial Volume: 8
Serial Issue: 1
Title: Basement response to the Laramide orogeny at Coad Mountain, Wyoming
Pages: 37-41
Published: 1969
Text Language: English
Publisher: University of Wyoming, Laramie, WY, United States
Accession Number: 1969-035748
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: 1969
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