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    Precambrian Geology of the Cottonwood Cliffs Area, Mohave County, Arizona

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    Thumbnail
    Name:
    azu_td_geo_0063_sip1_pg116_m.tif
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    214.3Mb
    Format:
    TIFF image
    Description:
    Geologic Map of the Cottonwood ...
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    azu_td_geo_0063_sip1_w.pdf
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    Description:
    Master's Thesis Full PDF
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    Author
    Beard, Linda Sue
    Issue Date
    1985
    Keywords
    Arizona
    axial-plane structures
    Cenozoic
    Cottonwood Cliffs
    folds
    foliation
    intrusions
    lineation
    lithostratigraphy
    metamorphic rocks
    Miocene
    Mohave County Arizona
    Neogene
    northwestern Arizona
    Peach Springs Tuff
    Precambrian
    Proterozoic
    Slate Mountain Fault
    stratigraphy
    structural analysis
    Tertiary
    United States
    upper Precambrian
    Valentine Granite
    Geology, Stratigraphic -- Precambrian
    Geology -- Arizona -- Mohave County
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    Advisor
    Davis, George H.
    Committee Chair
    Davis, George H.
    
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    Publisher
    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
    text
    Thesis-Reproduction (electronic)
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Geosciences
    Degree Grantor
    University of Arizona
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    Geosciences Theses

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