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Abstract
10-4 Gilbert, W. G., Laux, D. P., Spencer, J. E., and others, 1992, Geologic Map of the Western Gila Bend and Southern Eagletail Mountains, Maricopa and Yuma Counties, Arizona: Tucson, Arizona, Arizona Geological Survey Open-File Report, OFR-92-05, scale 1:24,000, 19 p.
Abstract
10-4 Gilbert, W. G., Laux, D. P., Spencer, J. E., and others, 1992, Geologic Map of the Western Gila Bend and Southern Eagletail Mountains, Maricopa and Yuma Counties, Arizona: Tucson, Arizona, Arizona Geological Survey Open-File Report, OFR-92-05, scale 1:24,000, 19 p.
ABS
The area described in this study includes the western Gila Bend and the southern Eagletail Mountains, Maricopa and La Paz counties, Arizona. The study area encompasses all of the Columbus Peak Quadrangle (1:24,000) and the northern part of the Hyder Northeast Quadrangle (1:24,000), and is partially within the Eagletail Mountains Wilderness Area (Fig. 1). Bedrock in this area consists largely of scattered, limited exposures of Proterozoic to Jurassic metamorphic and igneous rocks intruded by a Miocene granitoid pluton and overlain by an extensive sequence of Miocene silicic volcanic rocks and subordinate mafic and intermediate volcanic units and continental clastic rocks (plate 1). Sources of data are shown in Figure 2, rock-unit correlations and relative ages are shown in Figure 3, and map symbols are shown in Table 1.
The area was mapped with funds provided to the Arizona Geological Survey by the U.S. Geological Survey COGEOMAP program, contract #14-08-0001-A0872. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government.
Key words
Gila Bend Mountains, Eagletail Mountains, Maricopa County, Yuma County, Arizona, geologic map, Columbus Peak quadrangle, Hyder Northeast quadrangle
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Abstract
10-4 Gilbert, W. G., Laux, D. P., Spencer, J. E., and others, 1992, Geologic Map of the Western Gila Bend and Southern Eagletail Mountains, Maricopa and Yuma Counties, Arizona: Tucson, Arizona, Arizona Geological Survey Open-File Report, OFR-92-05, scale 1:24,000, 19 p.
ABS
The area described in this study includes the western Gila Bend and the southern Eagletail Mountains, Maricopa and La Paz counties, Arizona. The study area encompasses all of the Columbus Peak Quadrangle (1:24,000) and the northern part of the Hyder Northeast Quadrangle (1:24,000), and is partially within the Eagletail Mountains Wilderness Area (Fig. 1). Bedrock in this area consists largely of scattered, limited exposures of Proterozoic to Jurassic metamorphic and igneous rocks intruded by a Miocene granitoid pluton and overlain by an extensive sequence of Miocene silicic volcanic rocks and subordinate mafic and intermediate volcanic units and continental clastic rocks (plate 1). Sources of data are shown in Figure 2, rock-unit correlations and relative ages are shown in Figure 3, and map symbols are shown in Table 1.
The area was mapped with funds provided to the Arizona Geological Survey by the U.S. Geological Survey COGEOMAP program, contract #14-08-0001-A0872. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government.
Key words
Gila Bend Mountains, Eagletail Mountains, Maricopa County, Yuma County, Arizona, geologic map, Columbus Peak quadrangle, Hyder Northeast quadrangle
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