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    Surficial geologic maps of the Tucson Metropolitan Area

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    Author
    McKittrick, M.A.
    Issue Date
    1988
    Keywords
    Arizona Geological Survey Open File Reports
    Late Tertiary
    Quaternary
    Pleistocene
    Holocene
    Recent
    Canada del Oro Wash
    Pantano Wash
    Santa Cruz River
    Rillito Creek
    Tortolita Mountains
    Oro Valley
    Tucson Metropolitan Area
    Pima County
    Arizona
    erosion
    sediment
    alluvial fans
    geomorphology
    maps
    surficial geology
    Geology
    marana
    Tucson Mountains
    Rincon Mountains
    Santa Catalina Mountains
    Tucson Basin
    climate change
    basin-fill
    piedmont
    overbank deposits
    floodplain
    Flooding
    river terraces
    fluvial deposits
    channel deposits
    pediment
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    Metadata
    Show full item record
    Citation
    McKittrick, M.A., 1988, Surficial geologic maps of the Tucson Metropolitan Area. Arizona Geological Survey Open File Report, OFR-88-18, 12 map sheet, map scale 1:24,000, 7 p.
    Publisher
    Arizona Geological Survey (Tucson, AZ)
    Description
    Four geomorphically distinct ages of alluvial fan surfaces can be recognized on the piedmonts flanking the Catalina, Tortolita, and Tucson Mountains. Channel entrenchment of the upper piedmonts during the Quaternary has lead to the preservation of individual fan surfaces that become progressively younger and lower in relief toward the valley axes. Ongoing downcutting of Rillito Creek and Santa Cruz River as well as the Canada del Oro Wash has enhanced the incision of mountain-sourced drainages and further increased the relief separating alluvial surfaces of different ages. Thus, periods of climatically induced downcutting separated times of aggradation or equilibrium produce a sequence of discrete alluvial surfaces of different ages. Episodes of downcutting along the Santa Cruz and Rillito Rivers has further resulted in a series of fluvial terraces within the central Tucson Basin Area. Wide pediments flanking each of the mountain fronts in the map area indicate general tectonic quiescence during the Quaternary. (7 pages & 12 map sheets, 1:24,000 scale)
    URI
    http://hdl.handle.net/10150/630812
    Additional Links
    http://repository.azgs.az.gov/uri_gin/azgs/dlio/346
    Language
    en
    Series/Report no.
    OFR-88-18
    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
    32.5561
    South Bounding Coordinate
    31.9522
    West Bounding Coordinate
    -111.248
    East Bounding Coordinate
    -110.446
    Collections
    AZGS Document Repository

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