Surficial geology of the Wittmann and Hieroglyphic Mountains Southwest 7.5' Quadrangles, northern Maricopa County, Arizona
Dataset Identification:
Resource Abstract:
Most of southern and western Arizona lie within the Basin and Rangephysiographic province, a region characterized by broad
valleys and linear mountainranges. The valleys are deeply filled with alluvium that has eroded from adjacentmountains during
the last 10 My 1. This aggradation has been driven by tectonism andclimate change, although regional tectonic stability within
the last 5 My suggests thatclimate change is the more recent dominant driving force (Morrison, 1985). Climaticfluctuations
between relatively wet and dry conditions have resulted in pulses ofaggradation producing a mosaic of different aged alluvial
deposits in piedmont areas.Urban development on piedmonts, especially in the Phoenix Basin, has created a need tobetter understand
the distribution and nature of these deposits. Surficial geologic mapscharacterize and distinguish different piedmont deposits
on the basis of age and genesis.Such information provides baseline data for evaluating geologic hazards potential (e.g.,Pearthree,
1991), locating possible source areas for industrial minerals (e.g., Wellendorf etaI., 1986), and determining locations favorable
for groundwater recharge (e.g.,Huckleberry, 1994). Moreover, these maps are also useful for assessing the potential forburied
cultural resources and providing insight into local geologic history and landscapeevolution.This report presents the results
of surficial geologic mapping in the Wittmann andHieroglyphic Mountains SW 7.5' quadrangles located northwest of metropolitan
Phoenix(Figure 1). The project area includes segments of U.S. Highway 60, State Route 79, andthe Central Arizona Project Canal,
and is contiguous to the south with the White TanksMountain piedmont area previously mapped by Field and Pearthree (1991).(24
pages; 2 map sheets, map scale 1:24,000)
Citation
Title Surficial geology of the Wittmann and Hieroglyphic Mountains Southwest 7.5' Quadrangles, northern Maricopa County, Arizona
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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