Arizona Geological Survey Open File Reports
The results of 40 Ar/39 Ar analyses of 15 samples of rhyolitic ash-flow tuffs and one sample of a dacitic dome
from Mid-Tertiary and Cretaceous volcanic successions in the Tucson area are presented...
Resource Identifiers: OFR-03-02
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Sixteen rock samples were collected from several mountain ranges in southern
and central Arizona to determine their cooling history as revealed by 40 ArP9 Ar
thermochronology. This was done by...
Resource Identifiers: OFR-03-03
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Some of the richest helium-bearing gas in the world was produced from fields
completed specifically for helium in northeastern Arizona in the 1960s and 1970s. All
production came from fields in...
Resource Identifiers: OFR-03-05
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During the past several years accusations have been made that sand and gravel operations
along the Agua Fria River near Sun City are exposing nearby residents to asbestos. The
Arizona Geological...
Resource Identifiers: OFR-03-06
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Geochronologic analyses of igneous rocks were done over the past several years as part of the joint
State-Federal STATEMAP program. These analyses were done to determine the age of rocks in areas...
Resource Identifiers: OFR-03-08
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Giant desiccation cracks have been discovered in two areas near the settlement of
Wintersburg (Figure 1) on detailed aerial photos obtained from Maricopa County Flood
Control District. One area is...
Resource Identifiers: OFR-03-07
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Granitic rocks are classified by their relative proportions of quartz, plagioclase feldspar,
and potassium feldspar. Geologic mapping in the Mesa 19 x 29 Quadrangle by the Arizona
Geological Survey...
Resource Identifiers: OFR-03-09
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Uranium-238 and other radioactive isotopes (radioisotopes) are present in small concentrations in all geologic materials. In a tiny fraction of these materials, such as uranium ore, radioisotope...
Resource Identifiers: OFR-02-13
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This report summarizes the surficial geology and geomorphology of the Tinajas Altas
area on the Barry M. Goldwater Air Force Range in southwestern Arizona (Figure 1). The
purpose of these...
Resource Identifiers: OFR-02-02
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This report summarizes the surficial geology and geomorphology of the central Sauceda
Valley, on the East Tactical Range of the Barry M. Goldwater Air Force Range (Figure 1). The
purpose of these...
Resource Identifiers: OFR-02-03
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Karst is the name applied to topography that develops on land underlain by soluble rocks
such as limestone, gypsum, and salt. Karst terrain is characterized by solution features
such as caves,...
Resource Identifiers: OFR-02-07
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Landscape change detection using Landsat ETM+ sensor data and image processing
methods based on band orthogonalization are used for initial mapping of flood inundation
along JackrabbitWash, in...
Resource Identifiers: OFR-02-06
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Preliminary geologic map of the Oak Creek Ranch 7.5' Quadrangle, Gila County, Arizona.
Map scale 1:24,000.
Resource Identifiers: OFR-02-08
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Preliminary geologic map of the Young 7.5' Quadrangle, Gila County, Arizona -
one map sheet, map scale 1:24,000.
Resource Identifiers: OFR-02-11
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Preliminary geologic map of the Salt River Peak 7.5' Quadrangle, Gila County, Arizona -
one map sheet, map scale 1:24,000.
Resource Identifiers: OFR-02-12
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Preliminary geologic map of the Parallel Canyon 7.5' Quadrangle, Gila County, Arizona.
Map scale 1:24,000
Resource Identifiers: OFR-02-10
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Mission: To inform and advise the public about the geologic character of Arizona in order to foster understanding and prudent development of the State's land, water, mineral, and energy...
Resource Identifiers: Annual Report 2001
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This report summarizes geoarchaeological investigations and surficial geologic mapping
conducted on part of the Barry M. Goldwater Air Force Range (BMGR) in southwestern Arizona
in 1996. These...
Resource Identifiers: OFR-01-01
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This report summarizes geomorphologic investigations and surficial geologic mapping
conducted on part of the Barry M. Goldwater Air Force Range (BMGR) in southwestern Arizona
in 1997 and 1998....
Resource Identifiers: OFR-01-02
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In November 1997, a stratigraphic section of the Awatubi and Walcott Members of the Late
Proterozoic Kwagunt Formation, Chuar Group, located in the Sixtymile Canyon area, of the eastern
Grand...
Resource Identifiers: OFR-02-01
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