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A ravine is a landform that is narrower than a canyon and is often the product of streambank erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. [1] Ravines may also be called a cleuch, dell, ghout , gill or ghyll, glen, gorge, kloof (South Africa), and chine (Isle of Wight)
Canyon / Gorge – Deep chasm between cliffs; Chine – Steep-sided river valley; Couloir – Steep, narrow mountain gully; Defile (geography) – Narrow pass or gorge between mountains or hills; Gully – Landform created by running water and/or mass movement eroding sharply into soil; Mountain pass – Route through a mountain range or over a ...
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]
Canyon – Deep chasm between cliffs, includes gorge. Dale (landform) – Open valley; Coulee – Type of valley or drainage zone; Gully – Landform created by running water and/or mass movement eroding sharply into soil; Ravine – Small valley, often due to stream erosion; Valley – Low area between hills, often with a river running through it
There are two main types of channels, bedrock and alluvial, which are present no matter the sub-classification. Bedrock channels are composed entirely of compacted rock, with only patches of alluvium scattered throughout. Because the bedrock is constantly exposed it takes much less stream power to carve the channel.
In southern Louisiana the word coulée (also spelled coolie) originally meant a gully or ravine usually dry or intermittent but becoming sizable during rainy weather. As stream channels were dredged or canalized, the term was increasingly applied to perennial streams, generally smaller than bayous. The term is also used for small ditches or ...
Once downcutting continues the flattened valley bottom composed of bedrock (overlain with a possible thin layer of alluvium) is left above either a stream or river channel. These bedrock terraces are the strath terraces and are erosional in nature. [6] Unpaired fluvial terraces on the South Fork of the Shoshone River, Park County, Wyoming, 1923.
Great Bahama Canyon, between the islands of The Bahamas Hatteras Canyon, off the coast of North Carolina Hudson Canyon , extending from the Hudson River off the coast of New York City between the Long Island and the New Jersey coasts of the United States