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Post-Laramide (Oligocene) uplift in the Wind River Range, Wyoming

James R. Steidtmann, Larry T. Middleton and Mark W. Shuster
Post-Laramide (Oligocene) uplift in the Wind River Range, Wyoming
Geology (Boulder) (January 1989) 17 (1): 38-41


In late Oligocene time, the crest of the Wind River Range was uplifted from an erosion surface that formed during Laramide (Late Cretaceous-early Eocene) deformation. This uplift created the highest peaks in the Wyoming foreland and is indicated by rejuvenation of the range as a sediment source and by the physiography of the peaks. Differential movement of basement blocks in the core of the range is identified by apatite fission-track data. We distinguish this deformation from earlier Laramide compression and Neogene normal faulting and speculate that it occurred when Precambrian shear zones were reactivated in response to local flexural stress in the Laramide subsidence-uplift couple.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 17
Serial Issue: 1
Title: Post-Laramide (Oligocene) uplift in the Wind River Range, Wyoming
Affiliation: Univ. Wyo., Dep. Geol. and Geophys., Laramie, WY, United States
Pages: 38-41
Published: 198901
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 20
Accession Number: 1989-024524
Categories: Structural geologyGeomorphologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N42°45'00" - N43°30'00", W109°30'00" - W108°30'00"
Secondary Affiliation: North. Ariz. Univ., USA, United StatesShell Dev. Co., USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1989
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