Tanner Graben
Landform in the Grand Canyon, Arizona / From Wikipedia, the free encyclopedia
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Located directly downstream of the Little Colorado River confluence with the Colorado River, the Tanner Graben, in the Grand Canyon, Arizona, US is a prominence and cliffside rock formation below the East Rim. Tanner Graben is located riverside, on the Colorado River, on a north-northwest bank at Mile 68.5, and lies opposite Tanner Canyon. The Tanner Rapid, created by Tanner Creek lies at the riverside foot of the graben. The graben is a pronounced feature because of the black Cardenas Basalt that forms the middle section of the graben, presumably free of debris accumulation by its cliff face steepness, and winds, and airflow drainage that course through the Colorado River's canyons; unprotected side canyons of Cardenas Basalt show accumulations as a slope-forming geologic unit, with little showing of black basalt.
Tanner Graben | |
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Highest point | |
Elevation | 4,200 ft (1,300 m)– Lava Butte (Grand Canyon), 4,242 feet (1,293 m) |
Coordinates | 36°06′14″N 111°50′02″W |
Geography | |
Location | Grand Canyon, Colorado River, Mile 68.5, Desert View, (East Rim) |
Settlement | Desert View, Arizona |
Geology | |
Mountain type | Nankoweap Formation-(prominence), Cardenas Basalt & Dox Formation |
The Tanner Graben sits on the Butte Fault which trends north-south up the Colorado River, and the west side of Temple Butte; it forms the east flank of Tanner Graben.[1]
The Butte Fault is connected to the East Kaibab Monocline which trends north-south up the Colorado River, and turns north-northwest forming the east perimeter of the Kaibab Plateau, which lies due-north of the Tanner Graben region.[2]