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Thrust timing, growth of structural culminations, and synorogenic sedimentation in the type Sevier orogenic belt, Western United States

Peter G. DeCelles, Timothy F. Lawton and Gautam Mitra
Thrust timing, growth of structural culminations, and synorogenic sedimentation in the type Sevier orogenic belt, Western United States
Geology (Boulder) (August 1995) 23 (8): 699-702

Abstract

Most of the regional shortening in the type area of the Sevier orogenic belt in central Utah was accommodated by displacement on the Canyon Range (Neocomian-Aptian), Pavant (Aptian-Albian), Paxton (Cenomanian-Campanian), and Gunnison (late Campanian-Paleocene) thrust systems. Inception of each thrust system generated synorogenic sediment associated with frontal thrust-tip anticlines or triangle zones and older thrust sheets that were elevated above major ramps farther toward the hinterland. The Sevier culmination, a large antiformal duplex cored by crystalline basement rocks, developed during Paxton and Gunnison thrusting west of and structurally beneath the Canyon Range and Pavant thrusts. Growth of the Sevier culmination was coeval with reactivation of the Canyon Range and Pavant thrust systems and produced a second culmination in Proterozoic-Lower Cambrian rocks in the Canyon Range. These structural highs provided much of the sediment to the adjacent foreland basin from late Cenomanian to late Paleocene time, and may have helped to maintain critical taper in the thrust belt.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 23
Serial Issue: 8
Title: Thrust timing, growth of structural culminations, and synorogenic sedimentation in the type Sevier orogenic belt, Western United States
Affiliation: University of Arizona, Department of Geosciences, Tucson, AZ, United States
Pages: 699-702
Published: 199508
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 41
Accession Number: 1995-053226
Categories: Structural geologySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sects., geol. sketch map
N38°49'60" - N39°30'00", W113°30'00" - W111°49'60"
Secondary Affiliation: New Mexico State University, Las Cruces, NM, USA, United StatesUniversity of Rochester, Rochester, NY, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199519
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