Precambrian Geology of the Cottonwood Cliffs Area, Mohave County, Arizona
Issue Date
1985Keywords
Arizonaaxial-plane structures
Cenozoic
Cottonwood Cliffs
folds
foliation
intrusions
lineation
lithostratigraphy
metamorphic rocksMioceneMohave County ArizonaNeogenenorthwestern ArizonaPeach Springs TuffPrecambrianProterozoicSlate Mountain Faultstratigraphystructural analysisTertiaryUnited Statesupper PrecambrianValentine GraniteGeology, Stratigraphic -- PrecambrianGeology -- Arizona -- Mohave County
Advisor
Davis, George H.Committee Chair
Davis, George H.Metadata
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The University of Arizona.Rights
Copyright © is held by the author. Digital access to this material is made possible by the Antevs Library, Department of Geosciences, and the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author or the department.Collection Information
This item is part of the Geosciences Theses collection. It was digitized from a physical copy provided by the Antevs Library, Department of Geosciences, University of Arizona. For more information about items in this collection, please email the Antevs Library, antevs@geo.arizona.edu.Abstract
A belt of Early Proterozoic rocks crops out in the Cottonwood Cliffs area, northwest Arizona. The belt contains an eastern and a western assemblage separated by the Slate Mountain fault. The western assemblage consists of mafic to felsic metavolcanic rocks, metapelites, and metaconglomerates. The eastern assemblage consists of phyllites, felsic to intermediate metavolcanic rocks, metagraywackes, and metagabbro bodies. The belt is bounded to the east by foliated granodiorite. The Valentine granite intruded the belt on the west and north. Steeply-plunging lineations and fold axes, and northeast-trending vertical foliation dominate the structural fabric. The regional elongation direction is near-vertical, as indicated by mineral and pebble lineations, and is parallel to fold axes. Although only one deformational event is evident, the intensity of that event may have obliterated evidence of any earlier deformation. Tertiary basalts and the Peach Springs Tuff locally overly the metamorphic rocks. Cenozoic normal faults in the area are mostly of minor displacement.Type
textThesis-Reproduction (electronic)
Degree Name
M.S.Degree Level
mastersDegree Program
Graduate CollegeGeosciences
Degree Grantor
University of ArizonaCollections
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