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The maps, reports, and other information and content on this website are provided as a public service for informational purposes only. North of Red Canyon, the main branch of the fault trends into the volcanic bedrock of the Sevier Plateau and dies out (Doelling, 1975 #5538; Hintze, 1980 #5536). Sediment and lava flows eventually filled the side canyon to the level of the Esplanade Platform. Near Alton, differential erosion of indurated Quaternary deposits and relatively weak Cretaceous rocks formed a southeast-facing fault scarp. Segments of the fault were distinguished using Es, presence and style of Quaternary displacements, and changes in fault orientation. Tuweep came into use to describe the local white settlements. To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. These normal faults are downthrown to the west, and the Colorado River crosses these faults as it flows west in the Grand Canyon. document archiving, management and discovery. Toroweap, a Paiute term meaning "dry or barren valley," refers to many local features, including the geologic formation and fault, the valley, and the overlook. Yep, this is valley fill we're driving on here. An aerial-photo study by Anderson and Christenson (1989 #828) in this area indicates that the fault traces are expressed only as aligned drainages in bedrock, and that no through-going scarps occur on the irregular mass of Quaternary deposits. #4494 Anderson, L.W., and Miller, D.G., 1979, Quaternary fault map of Utah: Long Beach, California, Fugro, Inc, 35 p. pamphlet, scale 1:500,000. | Tucson, AZ 85721-0055. Southeast of Panguitch, 200 m (Anderson and others, 1978 #4548) of offset in the 560 ka (Best and others, 1980 #5537) Red Canyon volcanic flow suggests faulting during late Pleistocene time. Secure .gov websites use HTTPS Because cliff height varies from one area to another, the index was normalized by dividing by total cliff height. At the southern end, displacement is generally low and similar to that of the northern part of the Aubrey fault zone [995], with which it merges. Downcutting rates for the Colorado River in the eastern Grand Canyon (400 m/m.y.) Official websites use .gov are at least double the downcutting rates west of the faults (70–160 m/m.y.). A .gov website belongs to an official government organization in the The Toroweap fault is a major normal fault in Northwestern Arizona. Diffusion modelling determined the most recent surface rupture to be 3 ± 1 ka. Total normal displacement decreases to less than 100 m on the Kanab Plateau north of Toroweap Valley, but then dramatically increases to nearly 500 m north of the Utah-Arizona stateline. This site uses cookies. Users are responsible for verification of all facts and information to their own satisfaction. (for section) versus N15°E (for whole fault). The Hurricane Fault originates at the Toroweap Fault, in the region of the Colorado River, strikes as the westerly depression of the Toroweap Fault; the Toroweap strikes northerly from the Colorado at the east of Toroweap Valley, enters south Utah. Synopsis General: The Sevier/Toroweap fault zone is a long, north- to northeast-trending structure near the western margin of the Colorado Plateaus that has had substantial Cenozoic normal displacement. Beginning about 1.2 million years ago some flowed into Toroweap Valley, forming the flat-bottomed valley we see today. Please check your email address / username and password and try again. Geology of the Virgin and Beaverdam Mountains, Arizona, The Little Chino Fault, Central Arizona - Video, Late Quaternary Faulting and Seismic Hazard in Southeastern Arizona and Adjacent Portions of New Mexico and Sonora, Mexico, The University of Arizona Libraries | 1510 E. University Blvd.

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