Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Piggyback basin in the Sevier orogenic belt, Utah; implications for development of the thrust wedge

Timothy F. Lawton and James H. Trexler
Piggyback basin in the Sevier orogenic belt, Utah; implications for development of the thrust wedge
Geology (Boulder) (August 1991) 19 (8): 827-830

Abstract

Timing data on a frontal thrust system indicate that the Sevier thrust wedge of central Utah advanced rapidly to its ultimate structural front in approximately 30 m.y., between early Albian and Campanian time. It then persisted by out-of-sequence thrusting for an additional 25 m.y., until the early Eocene. The key to the history of the frontal thrust is a piggyback basin that formed on the hanging wall. Unconformity-bounded sedimentary units within the basin thin both westward and eastward onto structures generated by thrust faulting. Up to 860 m of upper Campanian to lower Eocene strata accumulated between these structures, which consist of a ramp anticline in the west and a thrust duplex in the east. The newly recognized interaction of coeval deposition and thrust deformation permits revised limits on the inception and longevity of the frontal thrust system.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 19
Serial Issue: 8
Title: Piggyback basin in the Sevier orogenic belt, Utah; implications for development of the thrust wedge
Affiliation: N.M. State Univ., Dep. Earth Sci., Las Cruces, NM, United States
Pages: 827-830
Published: 199108
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 23
Accession Number: 1991-040144
Categories: Structural geologyStratigraphySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sects., geol. sketch map
N39°02'60" - N39°49'60", W112°04'60" - W111°16'60"
Secondary Affiliation: Univ. Nev., USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1991
Close Modal

or Create an Account

Close Modal
Close Modal