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    Geologic Map of the Mormon Lake Quadrangle, Coconino County, Arizona

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    Author
    Holm, R.F.
    Issue Date
    1994
    Keywords
    Arizona Geological Survey Contributed Maps
    Pliocene
    Miocene
    Holocene
    Pleistocene
    Tertiary
    Quaternary
    Mormon volcanic field
    Colorado Plateau
    Mormon Mountain
    Mormon Lake
    pyroclastic flows
    lava flows
    volcano-tectonic basin
    dacite
    andesite
    Moenkopi Formation
    subalkali basalt
    transitional basalt
    cinder cone
    volcanic dome
    rhyolite
    Lake Mary fault
    basalt
    volcanism
    geochemistry
    
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    Citation
    Holm, R.F., 1994, Geologic Map of the Mormon Lake Quadrangle, Coconino County, Arizona. Arizona Geological Survey Contributed Map, CM-94-C, 1 map plate at 1:24,000 map scale, 24 p.
    Description
    The Mormon Lake quadrangle is in the northern part of the Mormon volcanic field, a late Cenozoic volcanic province on the southern margin of the Colorado Plateau (Holm and others, 1989). Except for Pleistocene and Holocene surficial deposits, all of the rocks mapped on the quadrangle are Miocene and Pliocene volcanic rocks. All geologic contacts and faults were traced in the field. Map units were defined on the bases of lithology and morphology, and stratigraphic relationships were determined in the field on the basis of traditional geologic principles such as superposition and cross-cutting relationships. The mapping strategy was to map all lava flows and vent structures that could be distinguished in the field as discrete units, and to trace each flow to its source vent. Each vent structure was given an identification number (see "Vent and flow identification numbers"), and related lava flows were identified with the same number. Small vent deposits and related flows (Tys and Tyb) that lack morphologic distinction on the map were not, however, given separate identification numbers. Multiple contiguous lava flows of the same lithology from the same vent, and individual flow units of compound lava flows and lava flow fields were not mapped separately (for example, Tibv, Tobs).
    URI
    http://hdl.handle.net/10150/629166
    Additional Links
    http://repository.azgs.az.gov/uri_gin/azgs/dlio/1505
    Language
    en
    Series/Report no.
    CM-94-C
    Collections
    AZGS Document Repository

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