Ellie Broadman, Arizona Geological Survey 20251203 The Rattlesnake Hill 7.5’ quadrangle is located in Mohave County, northwestern Arizona, about 10 km east of Kingman. The southern portion of the quadrangle consists of the northern Hualapai Mountains, while the northern portion is mainly low-relief alluvial plains. Rattlesnake Hill is the only feature of significant topographic relief north of Interstate 40, which trends roughly east-west through the quadrangle.An important watershed divide trends northwest from near the southeastern corner to the west-central portion of the quadrangle. Southwest of this divide is the Thirteenmile Wash-Sacramento Wash watershed, which in the quadrangle is drained by Sawmill Canyon. This stream system is integrated with the Colorado River. Northeast of the watershed divide is the Frees Wash subdivision of the Red Lake Playa watershed. Red Lake Playa is the low point of Hualapai Valley, and is primarily an internally drained watershed not integrated with the Colorado River. The main drainages in this watershed within the quadrangle are Frees Wash and Hualapai Canyon. Average annual rainfall in the quadrangle ranges from 8 to 16 inches, with the higher precipitation values concentrated over the Hualapai Mountains in the southern portion of the quadrangle.The bedrock geology of this quadrangle includes Paleoproterozoic metamorphic rocks that experienced migmatization during the emplacement of a Mesoproterozoic megacrystic granite. Additionally, the Neogene Peach Spring Tuff, and other Neogene lava flows are exposed in the southwestern part of the map and dip gently WNW. This geologic map was funded in part by the U.S. Geological Survey National Cooperative Geological Mapping Program under STATEMAP award G23AC00556. The views and conclusion obtained 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. 20251203 20251203 The Rattlesnake Hill 7.5’ quadrangle is located in Mohave County, northwestern Arizona, about 10 km east of Kingman. The southern portion of the quadrangle consists of the northern Hualapai Mountains, while the northern portion is mainly low-relief alluvial plains. Rattlesnake Hill is the only feature of significant topographic relief north of Interstate 40, which trends roughly east-west through the quadrangle. An important watershed divide trends northwest from near the southeastern corner to the west-central portion of the quadrangle. Southwest of this divide is the Thirteenmile Wash-Sacramento Wash watershed, which in the quadrangle is drained by Sawmill Canyon. This stream system is integrated with the Colorado River. Northeast of the watershed divide is the Frees Wash subdivision of the Red Lake Playa watershed. Red Lake Playa is the low point of Hualapai Valley, and is primarily an internally drained watershed not integrated with the Colorado River. The main drainages in this watershed within the quadrangle are Frees Wash and Hualapai Canyon. Average annual rainfall in the quadrangle ranges from 8 to 16 inches, with the higher precipitation values concentrated over the Hualapai Mountains in the southern portion of the quadrangle. The bedrock geology of this quadrangle includes Paleoproterozoic metamorphic rocks that experienced migmatization during the emplacement of a Mesoproterozoic megacrystic granite. Additionally, the Neogene Peach Spring Tuff, and other Neogene lava flows are exposed in the southwestern part of the map and dip gently WNW. Complete None planned -114.004645 -113.870663 35.253033 35.121997 ISO 19115 Topic Categories geoscientificInformation None Hualapai Mountains alluvial plains Sawmill Canyon Red Lake Playa Frees Wash Peach Spring Tuff lava flows granite None None Kwiatkowski, C., Blackford, N., Ma, C., and Mako, C., 2025, Geologic Map of the Rattlesnake Hill 7.5' Quadrangle, Mohave County, Arizona, DGM-293 20251204 Arizona Geological Survey Ellie Broadman mailing and physical

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Tucson AZ 85721 5206212352 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time