Arizona Geological Survey Open File Reports
Face Mountain and Oatman Mountain·are located approximately 25 miles northwest of the
town of Gila Bend and about 15 miles north of the town of Sentinel, in southwestern Maricopa
County, Arizona....
Resource Identifiers: OFR-93-10
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These nine maps depict the general ages and distribution of Quaternary geomorphic surfaces
and associated alluvium of the northern Avra Valley-Desert Peak (AVDP) area, Pinal and Pima
counties,...
Resource Identifiers: OFR-93-13
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This map summarizes the surficial geology of the Mesa 30' x 60' Quadrangle in central Arizona. Approx. 65 percent of the Mesa Quadrangle, including the rapidly growing eastern and...
Resource Identifiers: OFR-94-24
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The diversity of alluvial fan and pediment ages and the pristine Sonoran desert vegetation of the
Table Top Mountains make this region ideally suited to study relationships between geomorphic...
Resource Identifiers: OFR-94-22
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Geomorphologic and hydraulic methods were used to evaluate the reported magnitude of an
extraordinary flood in west-central Arizona. The peak discharge of the Bronco Creek flood of
August 19, 1971...
Resource Identifiers: OFR-94-19
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This report includes the area between Webb Mountain and Yellow Medicine Butte in the central
Gila Bend Mountains, approximately 30 kilometers northwest of Gila Bend, Arizona. The study area...
Resource Identifiers: OFR-94-18
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Historical aerial photographs, surficial features, and limited subsurface trenching on five
fluvially dominated alluvial fans in Arizona demonstrate that channel abandonment occurs along
bends and/...
Resource Identifiers: OFR-94-13
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Arizona Geological Survey
(AZGS) staff responded to
more than 13,800 requests
for information and assistance from
persons who wrote, telephoned, or
visited our offices to buy publications,
use...
Resource Identifiers: OFR-94-26
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Arizona has suffered relatively modest amounts of damage and destruction resulting from
earthquake shaking during its historical period. There is cause to be concerned about earthquake
hazards in...
Resource Identifiers: OFR-94-03
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The Palomas Mountains are located approximately 70 miles northeast of Yuma, Arizona, and
about 15 miles north of the town of Dateland in eastern Yuma County (Figure 1). Across a narrow
valley to...
Resource Identifiers: OFR-94-09
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Two active alluvial fans in the tectonically quiescent region of southern Arizona are
composed of discontinuous ephemeral stream systems characterized by alternating channelized
reaches and...
Resource Identifiers: OFR-94-12
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Earth fissures are tension cracks that form in response to land subsidence caused by groundwater pumping. Land subsidence is common in Arizona's alluvial basins, where extensive groundwater...
Resource Identifiers: OFR-94-11
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Virtually all rocks and soils contain uranium, which undergoes radioactive decay into hazardous radon gas. The average uranium concentration of crustal rocks is 2 to 3 parts per million (ppm)....
Resource Identifiers: OFR-90-05
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Uranium-vanadium deposits have been discovered and mined in the
Lukachukai Mountains, a high, rugged northwest spur of the Chuska
Mountains in northeastern Arizona. All of the economic deposits...
Resource Identifiers: OFR-88-19
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The Vulture Mountains, located directly southwest of Wickenburg in central Arizona,
contain one of Arizona's premier historic gold deposits, the Vulture Mine. This mine yielded
about 340,000...
Resource Identifiers: OFR-88-10
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Detailed geologic map and cross sections of the Big Horn and Belmont Mountains, West-central Arizona
The principal geologic feature of the Big Hom and Belmont Mountains is a complexly faulted and tilted
series of mostly Miocene volcanic rock that record a period of Middle Tertiary magmatism and...
Resource Identifiers: OFR-94-15
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The Tank Mountains of southwestern Arizona are a west-northwest trending range
which represent an approximately 30 km-Iong extension of a southeastern arm of the Kofa
Mountains. On all other sides...
Resource Identifiers: OFR-94-08
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Preliminary reconstruction of Miocene Extension in the Basin and Range of Arizona and adjacent areas
Large-scale continental extension significantly rearranged the distribution of pre-Tertiary rocks in southern
and western Arizona during Miocene time [Spencer and Reynolds, 1989a]. Topography...
Resource Identifiers: OFR-94-05
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This map depicts the distribution of geomorphic surfaces and associated alluvium of the
southern and southwestern piedmont of the Tortolita Mountains in Pima County, northwest of
Tucson, Arizona....
Resource Identifiers: OFR-93-14
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One of the fastest growing areas of Arizona is the eastern part of the Phoenix
Basin near the communities of Chandler, Gilbert, Mesa, and Apache Junction. Much of
this development has occurred on...
Resource Identifiers: OFR-93-15
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