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The canyon is a classic V-shaped valley, indicative of river-type erosion rather than glaciation. Today the canyon is still being eroded by the Yellowstone River. The colors in the canyon are also a result of hydrothermal alteration. The rhyolite in the canyon contains a variety of different iron compounds. When the old geyser basin was active ...
The last section of the canyon is a narrow, steep gorge 0.8 miles (1.3 km) wide, 700 feet (210 m) deep and about 1 mile (1.6 km) long. Most of the valley floor is a deep fill of alluvium that is up to 300 feet (91 m) thick in the deepest portions. From the valley floor, steep hills rise abruptly to the canyon rim in less than 0.4 miles (0.64 km).
A gulch is a deep V-shaped valley formed by erosion. It may contain a small stream or dry creek bed and is usually larger in size than a gully. [1] Sudden intense rainfall upstream may produce flash floods in the bed of the gulch. Witches Gulch found in the Dells of the Wisconsin River. In eastern Canada, gulch refers to: [2]
Glen – Name for valley commonly used in Ireland, Scotland and the Isle of Man; Gorge – Deep chasm between cliffs; Graben – Depressed block of planetary crust bordered by parallel normal faults; Gulch – Deep V-shaped valley formed by erosion; Gulf; Gully – Landform created by running water and/or mass movement eroding sharply into soil
In polar areas and at high altitudes, valleys may be eroded by glaciers; these typically have a U-shaped profile in cross-section, in contrast to river valleys, which tend to have a V-shaped profile. Other valleys may arise principally through tectonic processes such as rifting. All three processes can contribute to the development of a valley ...
Royal Gorge, Colorado; Ruby Canyon, Colorado and Utah; Sabino Canyon, Arizona; Saint Christopher's Canyon, Aibonito and Barranquitas, Puerto Rico; Salt River Canyon, Arizona; San Rafael River Gorge, Utah; Santa Elena Canyon, Big Bend National Park, Texas (also in Big Bend N.P.: Boquillas and Mariscal Canyons) Smoke Hole Canyon, West Virginia
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]
During and before the Pleistocene, the upper portion of the watershed was heavily glaciated during successive ice ages, with valley glaciers flowing as much as 40 miles (64 km) down the river's three forks, carving the V-shaped river canyons into the U-shaped gorges of Kings Canyon, Tehipite Valley and others. [37]