Surficial geology and geologic hazards of the Tucson Moutains, Pima County, Arizona: Avra, Brown Mountain, Cat Mountain and
Jaynes Quadrangles
Dataset Identification:
Resource Abstract:
This report and accompanying maps describe the surficial geology, geomorphology,and geologic hazards around the Tucson Mountains,
on the western margin of the Tucsonmetropolitan area. The mapping covers the Avra, Brown Mountain, Cat Mountain, andJaynes
7 1/2 quadrangles and includes part of the City of Tucson and unincorporatedPima County (Figure 1). The map area encompasses
the western edge of the Tucsonbasin floor, the eastern half of Avra Valley, and the Tucson Mountain foothills on theeastern
and northern flanks of the Tucson Mountains. The Tucson basin floor area hasbeen thoroughly altered by urban development,
and the Tucson Mountain foothills haveundergone substantial development during the past 30 years or so. The steeper mountainslopes
generally are within Tucson Mountain Park (Pima County) or the western unit ofSaguaro National Park, but development is occurring
immediately adjacent to theseparks. This report is intended to enhance our understanding of the surficial geologyaround the
Tucson Mountains and to aid in assessing and understanding geologic hazardsin this area. This new mapping complements previously
published bedrock mapping(Lipman, 1993).This surficial geologic mapping in the western portion of the Tucson area is part
ofcontinuing efforts by the AZGS to map the geology of the Phoenix Tucson urbancorridor. It builds on and complements previous
surficial geologic mapping efforts in theTucson area (McKittrick, 1988; Jackson, 1989; Demsey and others, 1993; Field andPearthree,
1993). The report is organized into a brief introduction and explanation ofmapping methods, unit descriptions, a summary of
the geologic and geomorphicframework of the area, and a discussion of geologic hazards. Tim Orr digitized the mapinformation,
generated the final linework and map layout, and provided quality controlfor the map compilation. Pete Corrao assisted with
map and report layout. Mapping wasconducted as part of the STATEMAP Program of the U.S. Geological Survey, contract#98HQAG2064.(
21 pages and two map sheets, map scale 1:24,000)
Citation
Title Surficial geology and geologic hazards of the Tucson Moutains, Pima County, Arizona: Avra, Brown Mountain, Cat Mountain and
Jaynes Quadrangles
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Metadata contact
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pointOfContact
individual Name Missing
organisation Name
Arizona Geological Survey
position Name missing
Contact information
Telephone
Voice 520.770.3500
Fax 520.770.3505
Address
416 W. Congress, Ste # 100, Tucson, AZ, 85701-1381
Country USA