canyon

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canyon

, cañon
a gorge or ravine, esp in North America, usually formed by the down-cutting of a river in a dry area where there is insufficient rainfall to erode the sides of the valley

canyon

See Mars, surface features; valley, lunar.

Canyon

 

a deep river valley with very steep, often perpendicular, walls and a narrow floor, usually completely occupied by theriverbed. One of the largest canyons in the world is the GrandCanyon of the Colorado River in the USA (length, over 320 km;depth, to 1, 800 m).

canyon

[′kan·yən]
(geography)
A chasm, gorge, or ravine cut in the surface of the earth by running water; the sides are steep and form cliffs.