Geologic map of the Union Hills 7.5' Quadrangle, Maricopa County, Arizona

Holloway, S.D.; Leighty, R.S.

dc.contributor.author	Holloway, S.D.	*
dc.contributor.author	Leighty, R.S.	*
dc.date.accessioned	2018-11-10T02:57:57Z
dc.date.available	2018-11-10T02:57:57Z
dc.date.issued	1998
dc.identifier.citation	Holloway, S.D. and Leighty, R.S., 1998, Geologic map of the Union Hills 7.5' Quadrangle, Maricopa County, Arizona. Arizona Geological Survey Open File Report, OFR-98-20, 1 map sheet, map scale 1:24,000, 22 p.
dc.identifier.uri	http://hdl.handle.net/10150/630825
dc.description	The Union Hills 7.5-minute Quadrangle is located in the Phoenix metropolitan area. The quadrangle is located north of downtown Phoenix and is bordered by Paradise Valley to the north and east, and the Phoenix Mountains to the south (Figure 1). The quadrangle is bounded by latitudes 33°37'30"N and 33°45'00''N, and longitudes 112°00'00"W and 112°07'30"W. The area south of the Union Hills has become highly urbanized during the last few decades and is still undergoing rapid population growth. Thus, the knowledge of the distribution and character of bedrock and surficial deposits is important to make informed decisions concerning management of the land and its resources. Geologic mapping of the Biscuit Flat Quadrangle is related to other 1:24,000 scale mapping projects in and around the Phoenix metropolitan area (Figure 1; see map plate). Geologic mapping of bedrock in the quadrangle was based on field mapping, whereas surficial mapping was based upon field observations, and the interpretation of aerial photographs and soils maps. The respective mapping coverage accomplished by each author (i.e., Holloway and Leighty) is shown on the map plate. A limited amount of unpublished Arizona Geological Survey mapping (by Steve Reynolds and Mike Grubensky for the Phoenix North 1:100,000 scale geologic map) augmented the new mapping of this report. Also, the 1 :24,000 scale mapping of Tertiary rocks by Jagiello (1987) is locally similar to that of this report. Aerial photography includes a series of black-and-white, 1 :20,000-scale (dated 1-19-70) and 1 :40,000 scale (dated 9-6-92) photos. Soil information was compiled from USDA Maricopa County soil surveys (Hartman, 1977; Camp, 1986). This project was supported by the Arizona Radiation Regulatory Agency, with funds provided by the U.S. Environmental Protection Agency through the State Indoor Radon Grant Program. Geologic map of the Union Hills 7.5' Quadrangle, Maricopa County, Arizona - report and one map sheet, scale 1:24,000
dc.language.iso	en
dc.publisher	Arizona Geological Survey (Tucson, AZ)
dc.relation.ispartofseries	OFR-98-20
dc.relation.url	http://repository.azgs.az.gov/uri_gin/azgs/dlio/382
dc.rights	Arizona Geological Survey. All rights reserved.
dc.subject	Arizona Geological Survey Open File Reports
dc.subject	Union Hills
dc.subject	Maricopa County
dc.subject	Arizona
dc.subject	quadrangle
dc.subject	map
dc.subject	topography
dc.subject	geomorphology
dc.subject	Geology
dc.title	Geologic map of the Union Hills 7.5' Quadrangle, Maricopa County, Arizona
csdgm.bounding.west	-112.107
csdgm.bounding.east	-112.013
csdgm.bounding.north	33.7637
csdgm.bounding.south	33.6964
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	2018-11-10T02:57:57Z