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    Geologic Map of the Sierra Ancha, Central Arizona, v. 1.0

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    Author
    Skotnicki, S.J.
    Issue Date
    2002
    Keywords
    Arizona Geological Survey Digital Geologic Maps
    Salt river
    Mogollon Rim
    Theodore Roosevelt Lake
    Sierra Ancha
    Arizona
    volcanic rock
    metamorphosed sedimentary
    Mississippian
    Permian
    Paleozoic
    Quaternary
    Pleistocene
    Cenozoic
    Proterozoic
    Superstition Mountains
    Tonto Creek
    Transition Zone
    Gila County
    Salt River Canyon
    Supai Formation
    Naco Formation
    Redwall Formation
    Martin Formation
    Bolsa Quartzite
    Coconino Sandstone
    Tapeats Sandstone
    Kaibab Limestone
    conglomerate
    silicic volcanics
    lacustrine
    landslide deposits
    alluvium
    Apache Group
    sedimentary rocks
    granitoids
    ancestral Salt River
    paleocanyon
    metamorphics
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    Citation
    Skotnicki, S.J., 2002, Geologic Map of the Sierra Ancha, Central Arizona: Arizona Geological Survey Digital Geologic Map DGM-24, version 1.0, map scale 1:24,000, 31 p., 2 map sheets and metadata.
    Publisher
    Arizona Geological Survey (Tucson, AZ)
    Description
    The Sierra Ancha are a series of high plateaus, mesas, and ridges that extend from Theodore Roosevelt Lake in the south to the Mogollon Rim on the north. The southern margin is in some paces a steep escarpment or series of escarpments, in part defined by normal faulting and down-dropping of blocks to the south and by relatively little faulting to the north. Faulds (1986) and Potochnik (1996) suggested that the southern margin of the Sierra Ancha is an ancient paleocanyon through which the ancestral Salt River flowed to the east. Deep, narrow canyons separate the mesas. Some of the deeper canyons reveal older, early Proterozoic (~1.7 Ga) metamorphosed sedimentary and volcanic rock and weakly deformed early and middle Proterozoic granitic rocks. However, most of the Sierra Ancha are composed of very weakly metamorphosed to unmetamorphosed, nearly flat-lying sedimentary rocks of the middle Proterozoic Apache Group.
    URI
    http://hdl.handle.net/10150/630953
    Additional Links
    http://repository.azgs.az.gov/uri_gin/azgs/dlio/491
    Language
    en
    Series/Report no.
    DGM-24
    Rights
    Arizona Geological Survey. All rights reserved.
    Collection Information
    Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
    North Bounding Coordinate
    34.25
    South Bounding Coordinate
    33.5
    West Bounding Coordinate
    -111.25
    East Bounding Coordinate
    -110.294
    Collections
    AZGS Document Repository

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