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    Surficial geologic maps and geologic hazards of the Green Valley-Sahuarita Area, Pima County, Arizona

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    Author
    Pearthree, P.A.
    Youberg, A.
    Issue Date
    2000-10-01
    Keywords
    Arizona Geological Survey Open File Reports
    Sahuarita
    Green Valley
    Pima County
    Arizona
    expanding development
    hazards
    geomorphology
    topography
    Geology
    Quaternary
    Santa Cruz River
    Twin Buttes
    Esperanza Mill
    surficial mapping
    urban growth
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    Citation
    Pearthree, P.A. and Youberg, A., 2000, Surficial geologic maps and geologic hazards of the Green Valley-Sahuarita Area, Pima County, Arizona. Arizona Geological Survey Open File Report, OFR-00-13, 2 map sheets, map scale 1:24,000, 21 p.
    Description
    This report and accompanying maps describe the surficial geology, geomorphology, and geologic hazards of the rapidly developing Green Valley – Sahuarita area on the southern fringe of the Tucson metropolitan area. The mapping covers the Esperanza Mill, Green Valley, Sahuarita, and Twin Buttes 7 1/2’ quadrangles (Figure 1). Most of the area is in unincorporated Pima County, but it includes the small but rapidly growing Town of Sahuarita. The whole map area is within the drainage basin of the Santa Cruz River, a major, north-flowing regional drainage that roughly bisects the four quadrangles. These maps cover most of the Santa Cruz Valley (this area can also be considered the southern part of the Tucson basin) between the Santa Rita Mountains on the east to the Sierrita Mountains on the west. There are several potentially conflicting land use issues in the area covered by these maps. It encompasses the southern fringe of the Tucson metropolitan area, which is experiencing rapid development and population growth. The western part of the map area includes several large open-pit copper mines that have been active for several decades. Much of the eastern part of map area is within the Santa Rita Experimental Range and Wildlife Area, a government-owned preserve that is undeveloped and will remain that way for the foreseeable future. Intense urban development has occurred and is continuing in the Green Valley area. Major developments have been proposed for the Canoa Ranch area along the Santa Cruz River. Rapid development is beginning in Sahuarita, which is on the suburban fringe of the Tucson metropolitan area. This report is intended to enhance our understanding of the surficial geology of the Green Valley – Sahuarita area and to aid in assessing and understanding geologic hazards in this area. This new mapping complements previously published mapping that focused on the bedrock in the area (Drewes, 1971; Cooper, 1973). ( 24 pages)
    URI
    http://hdl.handle.net/10150/630003
    Additional Links
    https://library.azgs.arizona.edu/
    Language
    en
    Series/Report no.
    OFR-00-13
    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
    31.9988
    South Bounding Coordinate
    31.7445
    West Bounding Coordinate
    -111.187
    East Bounding Coordinate
    -110.797
    Collections
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