Geologic Map of the Fountain Hills/Mount McDowell Area, Maricopa County, Arizona
KeywordsArizona Geological Survey Open File Reports
Basin and Range Province
Arizona Dam Butte
Union Hills Group
MetadataShow full item record
CitationSkotnicki, S.J., 1995, Geologic Map of the Fountain Hills/Mount McDowell Area, Maricopa County, Arizona. Arizona Geological Survey Open File Report, OFR-95-16, 1 map sheet, map scale 1:24,000, 28 p.
PublisherArizona Geological Survey (Tucson, AZ)
DescriptionMost of central Arizona is covered with basin sediments composed largely of unconsolidated sands and gravels. These deposits are important to planners, engineers, and geologists as they are the reservoir for vast amounts of groundwater, the source of important industrial materials, and the physical matrix that supports roads and buildings for most of Arizona's inhabitants. In addition, the bedrock geology of this area is complex and interesting, and hosts potentially economic mineral resources. Expanding population and burgeoning development in the Greater Phoenix metropolitan area requires more information regarding its geological resources and the spatial distribution of geologic hazards such as flooding that are common to basin environments.
RightsArizona Geological Survey. All rights reserved.
Collection InformationDocuments 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 email@example.com.
North Bounding Coordinate33.6996
South Bounding Coordinate33.5029
West Bounding Coordinate-111.857
East Bounding Coordinate-111.629
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Stratigraphy and Sedimentology of the Bisbee Group in the Whetstone Mountains, Pima and Cochise Counties, Southeastern ArizonaDickinson, W. R.; Archibald, Lawrence Eben; Schreiber, Joseph F., Jr.; Flessa, Karl; Archibald, Lawrence Eben (The University of Arizona., 1982)The Aptian-Santonian(?) Bisbee Group in the Whetstone Mountains comprises 2375 m of clastic sedimentary rocks and limestones. The basal Glance Conglomerate unconformably overlies the Pennsylvanian-Permian Naco Group. It consists of limestone conglomerates which were deposited in proximal alluvial fan environments. The superadjacent Willow Canyon Formation contains finer grained rocks which were deposited in the distal portions of alluvial fans. The lacustrine limestones in the Apache Canyon Formation interfinger with and overlie these alluvial fan facies. The overlying Shellenberger Canyon Formation is composed mostly of terrigenous rocks derived from westerly terranes. This formation contains thick sequences of fluvio-deltaic facies as well as a thin interval of estuarine deposits which mark a northwestern extension of the marine transgression in the Bisbee -Chihuahua Embayment. The youngest formation (Upper Cretaceous?) in the Bisbee Group, the Turney Ranch Formation, consists of interbedded sandstones and marls which were deposited by fluvial and marine(?) processes.