The additional mapping completed in 2014 was done in cooperation with Lettis Consultants International (LCI) as part of an investigation of seismic hazards for the PVNGS. This mapping was completed under the joint State-Federal STATEMAP program, as specified in the National Geologic Mapping Act of 1992. The mapping in 2005 was done in conjunction with geologic mapping of the Flatiron Mountain 7 ½' quadrangle (Spencer et al, 2005) to the north, and this quadrangle map is one of eight 1:24,000 scale geologic maps covering most of the Hassayampa Valley that have been produced in 2004 - 2006. Field checking was done in the spring, summer and fall of 2005, with additional fieldwork in the fall of 2013 and the winter and spring of 2014. Surficial deposits that cover most of the quadrangle were mapped by Philip Pearthree using color aerial photos from 1979, high-resolution digital color orthophotos provided by the Flood Control District of Maricopa County, National Agricultural Inventory Program (NAIP) photos from 20, and topographic information from U.S. The small bedrock hills in the southwestern quarter of the quadrangle were mapped by Charles Ferguson in the spring of 2005. It has experienced some suburban development associated with the PVNGS and is currently on the outer fringe of the greater Phoenix metropolitan area, so more development is likely in the future. The quadrangle includes the PVNGS, Interstate Highway 10, and numerous Maricopa County roads. The map area covers the piedmont between the Palo Verde Hills and the Hassayampa River and a 7 mile (11 km) reach of the Hassayampa River. The map area is located 40 to 55 miles (70-90 km) west of downtown Phoenix. The area covered by this geologic map includes all of the Wintersburg 7 ½' quadrangle and parts of the adjacent Arlington, Gillespie and Tonopah quadrangles surrounding the Palo Verde Nuclear Generating Station (PVNGS). Ultimately, this geologic study was intended to provideīetter understanding of the geothermal resources in Was hoped that geologic features could be identified thatĪre responsible for the hot water emanating from the Laboratory determined the age of three rock samples. Lisa Peters of the New Mexico Geochronology Research That potentially influence groundwater hydrology. Of approximately 18 km2 (7 mi2) to identify geologic features Of the Arizona Geological Survey mapped the geology Geological Survey geologists were granted permission toĪccess the area in 2014. Nature Conservancy’s Mule Shoe Ranch Preserve. Hookers Hot Springs and surrounding land are part of the Of the wide wash in Hot Springs Canyon, east of the San The hot spring itself is on the southwest flank Hot Springs 7.5’ Quadrangle in the southern Galiuro Miles) east of Tucson, Arizona, and is within the Hookers
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Hookers Hot Springs is located approximately 70 km (40 This geologic map complements 7 previous Arizona Geological Survey 7 ½’ quadrangle mapping projects in this general area, and the geologic map of the Cunningham Mountain 7 ½’ quadrangle immediately to the north (Johnson et al., 2021). The geologic mapping is part of a multi-year AZGS effort to map the bedrock and basin geology in the lower Colorado River Valley (e.g., Gootee et al., 2016 Johnson et al., 2017 Ferguson et al., 2018).
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In this part of the quadrangle, surficial deposits were mapped using orthophotography and topography, and were not field-checked. However, the southeastern part of the quadrangle covers a restricted part of the YPG where escorts are generally required for field mapping. Army, which granted us access to the area. The entire quadrangle is on the Yuma Proving Ground, administered by the U.S. This map depicts the bedrock and surficial geology of the Trigo Pass 7 ½’ quadrangle in the Trigo and southern Dome Rock Mountains in the lower Colorado River Valley, La Paz County, southwestern Arizona.