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・ Canyon, Minnesota
・ Canyon, Texas
・ Canwell Committee
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・ Canwest
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・ Canwood, Saskatchewan
・ Canworthy Water
・ Cany-Barville
・ Canyamars
・ Canyards Hills
・ Canyelles
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Canyon
・ Canyon (Agawa) railway station
・ Canyon (band)
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・ Canyon (disambiguation)
・ Canyon (Jimmy Ibbotson album)
・ Canyon (Paul Winter album)
・ Canyon (satellite)
・ Canyon Apache
・ Canyon Athletic Association
・ Canyon Bicycles
・ Canyon Blaster
・ Canyon Blaster (Adventuredome)
・ Canyon Blaster (Great Escape)
・ Canyon Blaster (Six Flags Magic Mountain)


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Canyon : ウィキペディア英語版
Canyon


A gorge or canyon (''cañon'', old spelling occasionally still used) is a deep ravine between pairs of escarpments or cliffs and is the most often carved landscape by the erosive activity of a river over geologic timescales. Rivers have a natural tendency to cut through underlying surfaces so will eventually wear away rock layers to lessen their own pitch slowing their waters; given enough time, their bottoms will gradually reach a baseline elevation—which is the same elevation as the body of water it will eventually drain into. This action, when the river source and mouth are at much different base elevations will form a canyon,〔http://www.mountainnature.com/Geology/Canyons.htm〕 particularly through regions where softer rock layers are intermingled with harder layers more resistant to weathering.
A canyon may also refer to a rift between two mountain peaks, such as those in ranges including the Rocky Mountains, the Alps, the Himalayas or the Andes. Usually a river or stream and erosion carve out such splits between mountains. Examples of mountain-type canyons are Provo Canyon in Utah or Yosemite National Park in California's Sierra Nevada. Canyons within mountains, or gorges that have an opening on only one side are called ''box canyons''. Slot canyons are very narrow canyons, often with smooth walls.
==Etymology==
The word ''canyon'' is Spanish in origin (''cañón'', , meaning big ''caña'', cane in English). The word ''canyon'' is generally used only in North America, while the words ''gorge'' and ''ravine'' are used in Europe and Oceania, though ''gorge'' and ''ravine'' are also used in some parts of North America. In the United States, place names generally use "canyon" in the southwest and "gorge" in the northeast, with the rest of the country graduating between these two according to geography. In Canada, "gorges" are usually narrow, and "ravines" more open and often wooded. The military-derived word ''defile'' is occasionally used in the United Kingdom.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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