Uinkaret Volcanic Field | U.S. Geological Survey Official websites use .gov .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS lock ( or means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Uinkaret Volcanic Field Find U.S. Volcano Filters The map displays volcanoes, earthquakes, monitoring instruments, and past lava flows. Get Help Earthquake Plots To view an earthquake cross-sectional plot, click "Draw Plot" to start drawing on the map. Once the plot area is selected, click on "View Plot" to view chart or "Clear Plot" to start over. Map Layers Earthquake Colors Earthquake Depth Units Earthquake Time Units Results Filters The map displays volcanoes, earthquakes, monitoring instruments, and past lava flows. Get Help Earthquake Plots To view an earthquake cross-sectional plot, click "Draw Plot" to start drawing on the map. Once the plot area is selected, click on "View Plot" to view chart or "Clear Plot" to start over. Settings Map Layers Earthquake Colors Earthquake Depth Units Earthquake Time Units Map Legend Map Legend Results Uinkaret Volcanic Field Maps Publications Connect The Uinkaret volcanic field is centered between the Toroweap and Hurricane faults, mostly north of the western Grand Canyon, in northwestern Arizona. The field contains at least 213 volcanic cones and associated basaltic lava flows. Quick Facts Location: Arizona, Mohave County Latitude: 36.38° N Longitude: 113.13° W Elevation: 1,555 (m) 5,102 (f) Volcano type: volcanic field Composition: basalt Most recent eruption: 1,000 years ago Nearby towns: St. George, Utah (80 km) Threat Potential: Low/Very Low* *based on the National Volcano Early Warning System Summary The field contains at least 213 volcanic cones and associated basaltic lava flows. Studies based upon older dating methods suggest that volcanoes began erupting within the field approximately 3.6 million years ago. The basalt of Mount Trumbull is the oldest unit and erupted atop Mount Trumbull, the highest mountain (2447 m, 8029 ft) in the volcanic field. Many of these early erupted basalts were lavas that flowed over a relatively flat erosional surface. Except for near Mount Emma, very few tephra deposits have been identified, but they may have been removed by erosion. At the end of the initial eruptive period, activity in the region was relatively quiet for approximately 2.6 million years. Around 600,000 years ago prolific eruptive activity occurred for at least 100,000 years, then continued less intensely until about 1,000 years ago. Lava flows originating on the Uinkaret Plateau repeatedly cascaded into the adjacent Grand Canyon to form dams that blocked the Colorado River. These dams have since eroded, but prominent markers such as Vulcan's Throne, a 215-m- (700-ft-) tall cinder cone and source vent for a dramatic lava flow that drapes the Grand Canyon wall, are reminders of these dams. The youngest eruptive unit in the Uinkaret volcanic field is the approximately 1,000-year-old basalt of Little Springs, located about 3 km (2 mi) south of Mount Trumbull and north of Grand Canyon. It originated from two closely associated vents, which coalesced into one large pool of lava that spread both north and south. A red cinder cone associated with the eruption was partially rafted away by the moving lava, and only the southwestern edge of the cone remains. This basalt is comparable in surface characteristics and texture Sunset Crater volcano. October 22, 2018 2018 update to the U.S. Geological Survey national volcanic threat assessment 2018 update to the U.S. Geological Survey national volcanic threat assessment When erupting, all volcanoes pose a degree of risk to people and infrastructure, however, the risks are not equivalent from one volcano to another because of differences in eruptive style and geographic location. Assessing the relative threats posed by U.S. volcanoes identifies which volcanoes warrant the greatest risk-mitigation efforts by the U.S. Geological Survey and its partners... Authors John W. Ewert, Angela K. Diefenbach, David W. Ramsey By Volcano Hazards Program Volcano Science Center Agrigan Ahyi Seamount Alamagan Anatahan Asuncion Belknap Black Butte Crater Lava Field Black Rock Desert Volcanic Field Blue Lake Crater Carrizozo Lava Flow Cascade Range Weekly Update Cinnamon Butte Clear Lake Volcanic Field Coso Volcanic Field Crater Lake Craters of the Moon Volcanic Field Daikoku Seamount Davis Lake Volcanic Field Devils Garden Lava Field Diamond Craters Volcanic Field Dotsero Volcanic Center East Diamante Esmeralda Bank Farallon de Pajaros Fukujin Seamount Glacier Peak Guguan Haleakalā Hell's Half Acre Lava Field Hualālai Indian Heaven Volcanic Field Jordan Craters Volcanic Field Kama‘ehuakanaloa Kasuga 2 Kīlauea Lassen Volcanic Center Long Valley Caldera Mammoth Mountain Markagunt Plateau Volcanic Field Maug Islands Mauna Kea Mauna Loa Medicine Lake Mono Lake Volcanic Field Mono-Inyo Craters Mount Adams Mount Bachelor Mount Baker Mount Hood Mount Jefferson Mount Rainier Mount Shasta Mount St. Helens Newberry Ofu-Olosega Pagan Red Hill-Quemado Volcanic Field Ruby Salton Buttes San Francisco Volcanic Field Sand Mountain Volcanic Field Sarigan Soda Lakes South Sarigan Seamount Supply Reef Ta'u Island Three Sisters Tutuila Island Ubehebe Craters Uinkaret Volcanic Field Valles Caldera Wapi Lava Field Weekly Update West Crater Volcanic Field Yellowstone Zealandia Bank Zuni-Bandera Volcanic Field Quick Facts Location: Arizona, Mohave County Latitude: 36.38° N Longitude: 113.13° W Elevation: 1,555 (m) 5,102 (f) Volcano type: volcanic field Composition: basalt Most recent eruption: 1,000 years ago Nearby towns: St. George, Utah (80 km) Threat Potential: Low/Very Low* *based on the National Volcano Early Warning System Volcanoes Hazards Program Links Assess Prepare Forecast Activity Products Observatories About Was this page helpful?