Surficial geology and geologic hazards of the Tucson Moutains, Pima County, Arizona: Avra, Brown Mountain, Cat Mountain and Jaynes Quadrangles

Pearthree, P.A.; Biggs, T.H.

dc.contributor.author	Pearthree, P.A.
dc.contributor.author	Biggs, T.H.
dc.date.accessioned	2018-11-10T02:56:47Z
dc.date.available	2018-11-10T02:56:47Z
dc.date.issued	1999-12-01
dc.identifier.citation	Pearthree, P.A. and Biggs, T.H., 1999, Surficial geology and geologic hazards of the Tucson Moutains, Pima County, Arizona: Avra, Brown Mountain, Cat Mountain and Jaynes Quadrangles. Arizona Geological Survey Open File Report, OFR-99-22, 2 map sheets, map scale 1:24,000, 19 p.
dc.identifier.uri	http://hdl.handle.net/10150/630819
dc.description	This report and accompanying maps describe the surficial geology, geomorphology, and geologic hazards around the Tucson Mountains, on the western margin of the Tucson metropolitan area. The mapping covers the Avra, Brown Mountain, Cat Mountain, and Jaynes 7 1/2’ quadrangles and includes part of the City of Tucson and unincorporated Pima County (Figure 1). The map area encompasses the western edge of the Tucson basin floor, the eastern half of Avra Valley, and the Tucson Mountain foothills on the eastern and northern flanks of the Tucson Mountains. The Tucson basin floor area has been thoroughly altered by urban development, and the Tucson Mountain foothills have undergone substantial development during the past 30 years or so. The steeper mountain slopes generally are within Tucson Mountain Park (Pima County) or the western unit of Saguaro National Park, but development is occurring immediately adjacent to these parks. This report is intended to enhance our understanding of the surficial geology around the Tucson Mountains and to aid in assessing and understanding geologic hazards in 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 of continuing efforts by the AZGS to map the geology of the Phoenix – Tucson urban corridor. It builds on and complements previous surficial geologic mapping efforts in the Tucson area (McKittrick, 1988; Jackson, 1989; Demsey and others, 1993; Field and Pearthree, 1993). The report is organized into a brief introduction and explanation of mapping methods, unit descriptions, a summary of the geologic and geomorphic framework of the area, and a discussion of geologic hazards. Tim Orr digitized the map information, generated the final linework and map layout, and provided quality control for the map compilation. Pete Corrao assisted with map and report layout. Mapping was conducted 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)
dc.language.iso	en
dc.publisher	Arizona Geological Survey (Tucson, AZ)
dc.relation.ispartofseries	OFR-99-22
dc.relation.url	https://library.azgs.arizona.edu/
dc.rights	Arizona Geological Survey. All rights reserved.
dc.subject	Arizona Geological Survey Open File Reports
dc.subject	Tucson Mountains
dc.subject	Pima County
dc.subject	Arizona
dc.subject	urban development
dc.subject	geomorphology
dc.subject	geologic hazards
dc.subject	surficial geology
dc.subject	Geology
dc.subject	Quaternary
dc.subject	Tucson
dc.subject	Jaynes
dc.subject	Cat Mountain
dc.subject	Avra Valley
dc.subject	STATEMAP
dc.title	Surficial geology and geologic hazards of the Tucson Moutains, Pima County, Arizona: Avra, Brown Mountain, Cat Mountain and Jaynes Quadrangles
csdgm.bounding.west	-111.228
csdgm.bounding.east	-110.919
csdgm.bounding.north	32.3823
csdgm.bounding.south	32.1
dc.description.collectioninformation	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.
refterms.dateFOA	2018-11-10T02:56:47Z