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Geologic Map of the Peach Springs 30 'X 60 'Quadrangle, Mohave And

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Geologic Map of the Peach Springs 30 'X 60 'Quadrangle, Mohave And Prepared in cooperation with the National Park Service and the Bureau of Land Management Geologic Map of the Peach Springs 30‘ x 60‘ Quadrangle, Mohave and Coconino Counties, Northwestern Arizona By George H. Billingsley, Debra L. Block, and Helen C. Dyer Pamphlet to accompany Scientific Investigations Map 2900 View looking north along the Hurricane Fault (westside down) and Diamond Butte (center of photo), Diamond Creek area of western Grand Canyon. Colorado River is flowing south.(photograph by G.H. Billingsley, 1988). 2006 U.S. Department of the Interior U.S. Geological Survey Introduction Debra L. Block, Flagstaff Science Center, U.S. Geologi- cal Survey, used ARC/MAP techniques to compile the map This map is a product of a cooperative project of the U.S. in digital format. This is the 5th map in a series of new digital Geological Survey, the U.S. National Park Service, and the :00,000-scale geologic maps for the Grand Canyon region. Bureau of Land Management to provide geologic map cover- The Peach Springs 30´ x 60´ quadrangle encompasses age and regional geologic information for visitor services and approximately 604 km2 (,980 mi2 ) within Mohave and resource management of Grand Canyon National Park, Lake Coconino Counties of northwestern Arizona. The quadrangle Mead National Recreation Area, Grand Canyon-Parashant- is bounded by longitudes 3° to 4° W, and latitudes National Monument, and adjacent lands in northwestern 35°30´ to 36°00´ N. The map area lies within the southwest Arizona. This map is a synthesis of previous and new geo- edge of the Colorado Plateaus Province (herein Colorado logic mapping that encompasses the Peach Springs 30´ x 60´ Plateau) and includes a small part of the eastern Basin and quadrangle, Arizona. The geologic data will support future Range Province in western Arizona. Billingsley and others geologic, biologic, hydrologic, and other science resource (997) locally subdivide the Colorado Plateau into seven studies of this area conducted by the National Park Service, physiographic parts within the map area: the Grand Canyon, the Hualapai Indian Tribe, the Bureau of Land Management, Shivwits Plateau, Sanup Plateau, Coconino Plateau, Hualapai the State of Arizona, and private organizations. Plateau, Truxton Valley, and Aubrey Valley (fig. ). Huala- Preliminary geologic maps of this area were produced by pai Valley of the Basin and Range Province occupies the Young (966), Huntoon and others (98), Huntoon (982), southwest corner of the map area. The Basin and Range and and Billingsley and Huntoon (983). These maps were modi- Colorado Plateau boundary is along the base of the Grand fied by Wenrich and others (996; 997), Billingsley and Wash Cliffs, along which the southern part of the Grand Wash others (999), and Billingsley and others (2000b). A geologic Fault is covered. map of the Mount Trumbull 30´ x 60´ quadrangle borders the The boundary between the Shivwits Plateau and Sanup north edge of this map (Billingsley and Wellmeyer, 2003), Plateau occupies a narrow platform bench-land formed by and a geologic map of the Grand Canyon 30´ x 60´ quadran- the Esplanade Sandstone and Pakoon Limestone between the gle adjoins the northeast corner (Billingsley, 2000). north rim and inner gorge of the Grand Canyon (fig. ). The 114°00' 113°00' 36°00' 206 262 Granite COCONINO o SA 207 lt GRAND WASH t N Park l UP u Canyon Fau CLIFFS a 209 F SHIVWITS a PL ings c A i TE t PLATEAU i AU t PLATEAU h 212 Spr l u w i a r e e F e ine t r v Quartermaster M l h u n. t p pe n . C l a yo Canyon ol GRAND a y 216 T a yn o u Gr C F C e an r a C at a n n w Fl d o F i io o e o t r s a r or r e e o H a arat T p v n 246 i e p a S R ic Se r r 239 u COLORADO Aubrey . 222 H yn 237 F C a ca Spen 224 u HUALAPAI lt iwhiti 235 er 230 226 CANYON Frazier M cer Can D 227 iam Wells Separation on ne d C ek G ti . re RAND Hill er yo av Cyn Tr Clay n n Springs on yo ny 18 Hindu-Lost Can WA ed Ca Man Canyons e ngs ri S lkw H Sp Mi COCONINO ch a A PLATEAU G PLATEAU U Pe B ra AU B n R ASIN ANDd RA B PLATEAU R E W EY Blue Mountain Y a MUSI s h H V F CL A UA C L a LE L ul IFF MO Y C AP t ? UNT L A S AIN IF I S 66 F N Y Peach Springs S VA LLE GE VA Nelson LL ON Grand Canyon Caverns EY UXT 35°30' TR Truxton SANTA FE RR 0 5 10 15 20 MILES 0 5 10 15 20 25 30 KILOMETERS Figure 1. Index map of the Peach Springs 30´ x 60´ quadrangle, Arizona, showing physiogeographical sub- provinces and some cultural and structural features. Numbers are Colorado River Miles as measured from Lees Ferry, Arizona. boundary between the Coconino Plateau and Aubrey Valley begin at Diamond Creek and end at South Cove on Lake east of the Colorado River is arbitrarily marked along the Mead northwest of the map area. There are several river com- east rim of Grand Canyon down to the top of the Redwall panies that schedule trips down the Colorado River; trips vary Limestone cliff that forms the south wall of Diamond Creek in length of travel days and costs. Check with the National and the west wall of Peach Springs Canyon about 6.5 km (4 Park Service Backcountry Office at Grand Canyon for infor- mi) north of Peach Springs, Arizona. Areas southeast of the mation about Colorado River trips. River trip permits from Redwall Limestone cliff are considered as being in the north- Diamond Creek to Lake Mead are obtained from the Hualapai west part of Aubrey Valley. The area from Peach Springs Tribe at Peach Springs, Arizona. to Truxton, Arizona is part of the Truxton Valley. West and northwest of Truxton Valley are the Music Mountains that form the south boundary of the Hualapai Plateau. The Huala- Geologic Setting pai Plateau is bounded on the southwest by the top of the The Colorado River and its tributaries have dissected the Grand Wash Cliffs and on the northeast by the inner gorge of southwestern Colorado Plateau into what is now the south- Grand Canyon that is formed by the Redwall Limestone cliff western part of Grand Canyon. The erosion of Grand Canyon or lower part of the Supai Group. has exposed about 426 m (,400 ft) of Proterozoic crystal- Elevations within the map area range from about 2,253 m line metamorphic rocks and granite, about ,450 m (4,760 (7,390 ft) on the east rim of Grand Canyon on the Coconino ft) of Paleozoic strata, and about 300 m (,000 ft) of Tertiary Plateau, northeast quarter of the map area, to 352 m (,56 sedimentary rocks. Outcrops of Proterozoic crystalline rocks ft) at the Colorado River Mile 262 (fig. ) in the northwest are exposed at the bottom of Grand Canyon at Granite Park quarter of the map area. Peach Springs, Arizona, is a small from Colorado River Mile 207 to 209, at Mile 22, and in the settlement within the map area (south-central edge of map) Lower Granite Gorge from Colorado River Mile 26 to 262, along U.S. Highway 66. Nelson, Arizona, is a limestone and along the Grand Wash Cliffs in the southwest corner of quarry mine along the Santa Fe Railroad east of Peach the map area (Karlstrom and others, 2003; fig. ). Springs. Grand Canyon Caverns is a small roadside park The majority of the map area is characterized by east along U.S. Highway 66 in the southeast corner of the map and northeast gentle dipping Paleozoic strata that overlie area. Frazier Wells is an abandoned village along Indian Proterozoic crystalline metamorphic and igneous rocks. The Route 8 on the Coconino Plateau. Public access to the map Paleozoic rocks form most of the cliffs and slopes in Grand area is by U.S. Highway 66 along the south edge of the map Canyon and display remarkable east-to-west facies changes and Indian Route 8. The Santa Fe Railroad passes through and thickness changes. Most of the Pennsylvanian strata Peach Springs, Arizona, and along part of the south edge of and all of the Permian strata were eroded from the Hualapai the map area (fig. ). Plateau, Truxton Valley, and Aubrey Valley areas during A dirt road, locally known as the Diamond Creek Road, Late Cretaceous through Eocene time, when tectonic events leads 33.5 km (2 mi) from Peach Springs down into Peach caused east-northeast crustal contraction and regional uplift Springs Canyon and to the Colorado River at the mouth of of the southwestern Colorado Plateau margin (Young, 966; Diamond Creek (Colorado River Mile 226 as measured from 985; 987; 200). North and northeast flowing drainages Lees Ferry, Arizona). This road is maintained by the Hualapai from higher terrain southwest of the map area removed some Tribe and is the only vehicle access to the Colorado River of the Permian strata and almost all the Mesozoic strata from in Grand Canyon for Colorado River raft trips and hiking. the Coconino and Shivwits Plateaus within the map area. Access to the Colorado River is by permit only from the Deep paleocanyons, such as Milkweed, Hindu, Lost Man, Hualapai Tribe.
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