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    Bedrock Geologic Map of Sentinel Peak (A-Mountain) and Tumamoc Hill, Pima County, Arizona, v. 1.0

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    Author
    Spencer, J.E.
    Moore, E.M.
    Trapp, R.A.
    Issue Date
    2003
    Keywords
    Arizona Geological Survey Digital Geologic Maps
    Tumamoc Hill
    Sentinel Peak
    Tucson Mountains
    Pima County
    Arizona
    Cat Mountain
    Tucson
    A-Mountain
    bedrock geology
    digital geologic map
    digital cartography
    Mid-Tertiary
    radiometric ages
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    Citation
    Spencer, J.E., Moore, E.M., and Trapp, R.A., 2003, Bedrock Geologic Map of Sentinel Peak (A-Mountain) and Tumamoc Hill, Pima County, Arizona: Arizona Geological Survey Digital Geologic Map DGM-29, version 1.0, map scale 1:24,000.
    Publisher
    Arizona Geological Survey (Tucson, AZ)
    Description
    Tumamoc Hill and Sentinel Peak form a group of hills at the western edge of Tucson in southeastern Arizona, and comprise a small part of the Tucson Mountains. Sentinel Peak, also known as A-Mountain, is a prominent landmark near downtown Tucson. The geology of Tumamoc Hill and Sentinel Peak is dominated by 20 to 30 million year old (Ma) volcanic rocks, unlike most of the rest of the Tucson Mountains which are composed primarily of much older volcanic rocks that were largely produced during a single enormous eruption (Lipman, 1993; Kring, 2002). This map is simplified from the map of Phillips (1976, University of Arizona M.S. thesis). It was created so that the geology of the Tumamoc Hill – Sentinel Peak area can be readily discerned from an available color map, and includes a description of map units and their approximate ages. Potassium-argon (K-Ar) radiometric dates are given with 1σ analytical uncertainty, and most dates are recalculated by Reynolds et al. (1986) using newer decay and abundance constants.
    URI
    http://hdl.handle.net/10150/630878
    Additional Links
    https://library.azgs.arizona.edu/item/ADGM-1552430340945-213
    Language
    en
    Series/Report no.
    DGM-29
    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
    32.2
    South Bounding Coordinate
    32.094
    West Bounding Coordinate
    -111.04
    East Bounding Coordinate
    -110.982
    Collections
    AZGS Document Repository

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