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    Surficial Processes on Two Fluvially Dominated Alluvial Fans in Arizona

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    Author
    Field, J.J.
    Issue Date
    1994
    Keywords
    Arizona Geological Survey Open File Reports
    Arizona
    alluvial fans
    Geology
    map
    surficial geology
    Surficial Processes
    Miocene
    Quaternary
    Pleistocene
    Holocene
    Basin and Range Province
    White Tank Mountains
    Tortolita Mountains
    White Tank Fan
    Cottonwood Fan
    Southern Arizona
    fanglomerates
    channalization
    sheetflood
    climate
    climate change
    base-level
    piedmont
    ephemeral streams
    Pima County
    Maricopa County
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    Citation
    Field, J.J, 1994, Surficial Processes on Two Fluvially Dominated Alluvial Fans in Arizona. Arizona Geological Survey Open File Report, OFR-94-12, 31 p.
    Description
    Two active alluvial fans in the tectonically quiescent region of southern Arizona are composed of discontinuous ephemeral stream systems characterized by alternating channelized reaches and sheetflood zones. Channel erosion and overland flow on inactive portions of the fans form new channel reaches with the capacity to divert active flow paths. The distribution and importance of sheetflooding on the fans is strongly controlled by local drainage-basin characteristics and base-level controls. Sheetflooding predominates where sandy bank sediments lead to the development of wide shallow channels, but channelization occurs at the fantoe in areas of long-term base-level lowering. The influence of climate on alluvial-fan formation has often been emphasized in previous studies, but is of only limited importance on active alluvial fans in Arizona.
    URI
    http://hdl.handle.net/10150/630006
    Additional Links
    https://library.azgs.arizona.edu/
    Language
    en
    Series/Report no.
    OFR-94-12
    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
    33.6722
    South Bounding Coordinate
    32.4059
    West Bounding Coordinate
    -112.736
    East Bounding Coordinate
    -110.803
    Collections
    AZGS Document Repository

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