Award Date

1-1-1988

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Geoscience

First Committee Member

Frederick W. Bachhuber

Number of Pages

121

Abstract

The Late Cretaceous to Paleocene(?) Canaan Peak Formation of southwestern Utah is comprised of approximately 100 m of cobble conglomerate and subordinate sandstone. Gravel deposition occurred during high-discharge periods within a Scott-type, perennial, braided fluvial system as longitudinal (Gm) and sinuous-crested transverse (Gt) bars, and as a product of longitudinal bar-top and inter-bar channel scour filling (Gt). Sand accumulated under lower flow velocity conditions through migration of inter-bar channel dunes and transverse bars (St/Sp) and development of scour-and-fill deposits (Ss). Siltstone (Fm) deposition resulted from vertical accretion on bar tops during waning flow conditions; Clast imbrication and trough axis orientation measurements indicate east to northeast paleoflow directions; Canaan Peak Formation detritus was derived from erosion of highlands created by Cretaceous Servier-style thrust faulting to the west in southeastern Nevada and western Utah and was distributed across an extensive gravel-dominated braid-plain complex. Sediments represent multiple-cycle deposits that were transported eastward a minimum distance of 70 to 80 km. (Abstract shortened with permission of author.).

Keywords

Canaan Peak Formation; Cliff; Late Cretaceous; Kaiparowits; Paleocene; Plateaus; Provenance; Southwestern Utah; Stream; Utah

Controlled Subject

Geology

File Format

pdf

File Size

5068.8 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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