Spectacular bedrock scarps in the Orderville-Glendale area are largely the result of erosion of the relatively weak Cretaceous rocks that are downfaulted against the resistant Navajo Sandstone (Cashion, 1967 #5539). JavaScript is disabled for your browser. It is the smallest of the six. This section is 89 km of a total fault length of 250 km. Quaternary basalts at Black Mountain, northeast of Glendale, are possibly faulted up to 23 m (Cashion, 1961 #4446), but the amount of displacement is difficult to determine due to uncertainties in distinguishing scarps related to landslides, pre-flow topography, and faults.

A giant side canyon to the Colorado River was carved along this fault but the Toroweap Valley here is infilled with lava and gravel some 3,000 feet thick! Along its southern end are four displaced Quaternary surfaces, three of which have measurable displacements that are multiples of about 2.2 m. Soil carbonate analysis was carried out to estimate ages for the three surfaces. The index is inversely proportional to total displacement.

All rights reserved. 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. The export option will allow you to export the current search results of the entered query to a file.

Beginning about 1.2 million years ago some flowed into Toroweap Valley, forming the flat-bottomed valley we see today.

Because cliff height varies from one area to another, the index was normalized by dividing by total cliff height. 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.
United States. ) or https:// means you’ve safely connected to the .gov website. Jackson, G.W., 1990, Tectonic geomorphology of the Toroweap Fault, western Grand Canyon, Arizona: Implications for transgression of faulting on the Colorado Plateau. 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. Share sensitive information only on official, secure websites. Tectonic geomorphology of the Toroweap Fault, western Grand Canyon, Arizona: Implications for transgression of faulting on the Colorado Plateau, Plate 1:Quarternary geologic strip map of the Toroweap Fault and vicinity, western Grand Canyon, Arizona, Plate 2:Quaternary geologic strip map of the Toroweap Fault and vicinity, western Grand Canyon, Arizona, Tectonic geomorphology of the Toroweap Fault, western Grand Canyon, Arizona - Report, Arizona Geological Survey Open File Reports, Arizona Geological Survey Contributed Reports, Arizona Geological Survey Digital Geologic Maps. document archiving, management and discovery. An official website of the United States government. These normal faults are downthrown to the west, and the Colorado River crosses these faults as it flows west in the Grand Canyon. An unfilled sediment trap formed against a small (<5-m-high), 2-km-long, west- (uphill-) facing scarp on the main trace suggests an age of only a few thousand years, but the scarp is believed to be related to gravity-driven subsidence rather than surface faulting because ridgelines cut by the scarp show little or no tectonic throw. Cosmogenic, Explore recent publications by USGS authors, Browse all of Pubs Warehouse by publication type and year, Descriptions of US Geological Survey Report Series, https://doi.org/10.1130/0091-7613(2001)​029<1035:DROTTA>​2.0.CO;2, Displacement rates on the Toroweap and Hurricane faults: implications for Quaternary downcutting in the Grand Canyon, Arizona, 10.1130/0091-7613(2001)​029<1035:DROTTA>​2.0.CO;2.

Yep, this is valley fill we're driving on here. You could not be signed in. Search for other works by this author on: You do not currently have access to this article. The maps, reports, and other information and content on this website are provided as a public service for informational purposes only. Near Alton, differential erosion of indurated Quaternary deposits and relatively weak Cretaceous rocks formed a southeast-facing fault scarp. Box 210184, Tucson, AZ 85721.

Along its southern end are four displaced Quaternary surfaces, three of which have measurable displacements that are multiples of about 2.2 m. On the basis of three-point solutions and projections to the fault, Anderson and Christenson (1989 #828) estimated 475 m of throw at the Coral Pink Sand dunes, north of the Utah-Arizona stateline. An extrapolated carbonate accumulation was used to estimate an age for the oldest surface of between 26 and 54 ka; the youngest displaced surface is between 4 and 11 ka. By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. Please check your email address / username and password and try again. For more information about items in this collection, please contact azgs-info@email.arizona.edu. LockA locked padlock

Segments of the fault were distinguished using Es, presence and style of Quaternary displacements, and changes in fault orientation. Geology ; 29 (11): 1035–1038. Cinder cones are also found near the western end of Grand Canyon, between Toroweap Valley and Hurricane fault.

It is the Esplanade Platform on the upthrown side of the fault, while the bench in the center distance is the same feature faulted lower to the west.

Faulting probably increased downcutting in the eastern Grand Canyon relative to downcutting in the western Grand Canyon during the late Quaternary. Over time lava issued from more than 60 vents.

Displacement on the fault generally increases from south to north.

Users are responsible for verification of all facts and information to their own satisfaction. N18°E Jackson, G.W., 1990, The Toroweap Fault: One of the most active faults in Arizona: Arizona Geology [Arizona Geological Survey], p. 7-10. Downcutting rates for the Colorado River in the eastern Grand Canyon (400 m/m.y.) The Sevier/Toroweap fault zone is located near the western margin of the Colorado Plateaus Province. The Toroweap fault is a major normal fault in Northwestern Arizona. To export the items, click on the button corresponding with the preferred download format. The Toroweap fault is a major normal fault in Northwestern Arizona. Jackson, G.W., 1990, The Toroweap Fault: One of the most active faults in Arizona: Arizona Geology [Arizona Geological Survey], p. 7-10.

The Toroweap and Hurricane faults, considered to be the most active in Arizona, cross the Uinkaret volcanic field in the western Grand Canyon. The Toroweap fault is a major normal fault in Northwestern Arizona. All 3Hec dates are younger than existing K- Ar dates and are consistent with new 40Ar/39Ar dates and existing thermoluminescence (TL) dates on basalt flows. Anderson) indicate about 900 m of throw on the basement at Red Canyon east of Panguitch, Utah. The Toroweap Fault underlies the valley, and volcanic activity along the fault resulted in the Uinkaret volcanic field, from where lava flows filled the side canyon.

Arizona Geological Survey Open File Reports, http://repository.azgs.az.gov/uri_gin/azgs/dlio/451. As much as 300 m of Cenozoic normal displacement has occurred across the fault zone near the Grand Canyon. Along its southern end are four displaced Quaternary surfaces, three of which have measurable displacements that are multiples of about 2.2 m. Soil carbonate analysis was carried out to estimate ages for the three surfaces. Near the north end of the Sevier/Toroweap fault zone, Anderson and Miller (1979 #4494) and Carpenter and others (1967 #4445) show the fault as several dashed traces that terminate to the north in bedrock. 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). Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. The Toroweap fault is a major normal fault in Northwestern Arizona. doi: https://doi.org/10.1130/0091-7613(2001)029<1035:DROTTA>2.0.CO;2. Its beginning there is small, …

In this shot we can clearly see the offset on the Toroweap Fault which runs across the photo behind the shadowed cliff on the left. Secure .gov websites use HTTPS Arizona Geology [Arizona Geological Survey], p. 7-10. Accuracy is not guaranteed, and the information contained or linked on this website should not be relied on except as general information.
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These different dating techniques may be combined in an analysis of displacement rates. Middle and late Quaternary displacement rates of the Toroweap and Hurricane faults are 70–180 and 70–170 m/m.y., respectively.

These normal faults are downthrown to the west, and the Colorado River crosses these faults as it flows west in the Grand Canyon. A lock ( #1 Toroweap Fault Unclassified Updated: 2019-10-14 The Toroweap Fault of northwest Arizona and southwest Utah is part of a fault system of the west Grand Canyon region, Arizona, USA also the west perimeter regions of the Coconino and Colorado Plateaus.

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