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The Grand Canyon, Arizona, at the confluence of the Colorado River and Little Colorado River.. A canyon (from Spanish: cañón; archaic British English spelling: cañon), [1] gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. [2]
The resulting Grand Canyon Supergroup of sedimentary units is composed of nine varied geologic formations that were laid down from 1.2 billion and 740 million years ago in this sea. [11] Good exposures of the supergroup can be seen in eastern Grand Canyon in the Inner Gorge and from Desert View, Lipan Point and Moran point. [12] [note 1]
The Devonian Temple Butte Formation, also called Temple Butte Limestone, outcrops through most of the Grand Canyon of Arizona, USA; it also occurs in southeast Nevada.Within the eastern Grand Canyon, it consists of thin, discontinuous and relatively inconspicuous lenses that fill paleovalleys cut into the underlying Muav Limestone.
The oldest beds of this formation belong to the Dinosaur Canyon Member, a reddish, slope-forming rock layer with thin beds of siltstone that are interbedded with mudstone and fine sandstone. [11] The Dinosaur Canyon, with a local thickness of 140 to 375 feet (43 to 114 m), was probably laid down in slow-moving streams, ponds and large lakes. [7]
Pribilof Canyon, in the Bering Sea, southeast of the Pribilof Islands, Alaska; Scripps Canyon, off the coast of La Jolla, southern California; Zhemchug Canyon, in the central Bering Sea between the Aleutian Islands of Alaska and the Kamchatka Peninsula of Russia; the largest submarine canyon in the world based on drainage area
The Shinumo Quartzite ranges in thickness from 330 m (1,080 ft) in the Bright Angel Canyon area to 345 m (1,132 ft) at Papago Creek and 405 m (1,329 ft) in the Shinumo Creek area. In the Bright Angel Canyon area, the upper member is about 18 m (59 ft) thick, the upper middle member is about 80 m (260 ft) thick, and the lower middle member is ...
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The Dox Formation, also known as the Dox Sandstone, is a Mesoproterozoic rock formation that outcrops in the eastern Grand Canyon, Coconino County, Arizona.The Dox Formation comprises the bulk of the Unkar Group, the older subdivision of the Grand Canyon Supergroup.