Arizona Geological Survey Open File Reports
Arizona Geological Survey Annual Report, Fiscal Year 1989-1990
Resource Identifiers: OFR-90-11
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Since earth fissures were first discovered in south-central Arizona in the late 1920's (Seismological
Society of America, 1927), they have been investigated by many workers, who have offered...
Resource Identifiers: OFR-90-7
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The little Horn Mountains 30' x 60' quadrangle is situated in the Sonoran Desert section of the Basin and Range Province in southwestern Arizona. This map depicts the alluvial deposits that...
Resource Identifiers: OFR-90-08
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The Sand Tank fault ~10km southwest of the proposed
Superconducting Super Collider site in Maricopa County, south central
Arizona, is characterized a ~3.5 km-long northeast trending
Piedmont fault...
Resource Identifiers: OFR-90-01
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Tectonic geomorphology of the Toroweap Fault, western Grand Canyon, Arizona: implications for transgression of faulting on the Colorado Plateau. The Toroweap fault is a major normal fault in...
Resource Identifiers: OFR-90-04
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Numerous debris flows occurred in the Huachuca Mountains of
southeastern Arizona during the summer rainy season of 1988 in
areas that were burned by a forest fire earlier in the summer.
Debris...
Resource Identifiers: OFR-90-06
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The Bouse Hills are located in west-central Arizona (Fig. 1) and are within the Basin and Range
physiographic province of the Southwest. The Bouse Hills consist of four rock assemblages (Fig. 2), as...
Resource Identifiers: OFR-90-09
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This report includes a 1:24,000 scale geologic map of a portion of the central Gila Bend Mountains.
The map covers portions of the Fourth of July Butte, Gillespie, and Quail Springs Wash 7.5'...
Resource Identifiers: OFR-91-07
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The eastern Gila Bend Mountains, Maricopa County, Arizona, are composed of Early Proterozoic
crystalline rocks and overlying mid-Tertiary continental clastic and volcanic rocks of the Sil Murk...
Resource Identifiers: OFR-91-05
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A detailed paleoflood investigation was performed in five canyons supplying flood
flows to the piedmont of the Tortolita Mountains. The results of the study reveal large
discrepancies between...
Resource Identifiers: OFR-91-06
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Information requested. Information and assistance were provided to more
than 3,900 persons who wrote, telephoned, or visited the Arizona Geological
Survey (AZGS) to buy publications, use the...
Resource Identifiers: OFR-91-12
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These nine maps depict the distribution and general ages of Quaternary geomorphic surfaces
and associated alluvial deposits surrounding the White Tank Mountains, on the western margin of the...
Resource Identifiers: OFR-91-08
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Assessment of the character of flood hazards and the extent of flood-prone areas on
the piedmonts of Arizona is an increasingly important concern to floodplain managers as
urban areas continue to...
Resource Identifiers: OFR-91-10
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The character of flooding and the extent of flood-prone areas on the southern
piedmont of the Tortolita Mountains have been disputed by local and federal flood plain management
officials since at...
Resource Identifiers: OFR-91-11
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Earth fissures are one of the geologic hazards that have damaged the facilities of the Central Arizona
Project (CAP). Earth fissures exist along at least two reaches of the Tucson aqueduct, and more...
Resource Identifiers: OFR-91-01
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Geologic Map of the Red Hill Quadrangle, La Paz County, Arizona. Scale 1:24,000.
Resource Identifiers: OFR-92-14
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Geologic Map of the Imperial Reservoir Quadrangle, Yuma County, Arizona, and Imperial County, California, Scale 1:24,000
Resource Identifiers: OFR-92-11
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The Bullard mineral district is one of approximately 15 mineral districts in west-central Arizona and
southeastern California that are related to large-displacement, regionally low-angle normal...
Resource Identifiers: OFR-92-01
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Separate maps show the ranges of values for each parameter. Polygons enclose areas
where parameter values are within a range specified by the DRASTIC system, and a numerical
rating is assigned to...
Resource Identifiers: OFR-92-13
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Geologic maps have traditionally emphasized bedrock rather than unconsolidated
sediments, the latter usually being lumped into the generic category of "Tertiary and/or
Quaternary alluvium...
Resource Identifiers: OFR-92-07
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