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2007-01-09 19:02:10 · 5 answers · asked by ndikuwen 1 in Science & Mathematics Geography

5 answers

A canyon or gorge is a deep valley between cliffs often carved from the Earth by a river. Most canyons originate by a process of long-time erosion from a plateau level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls. Canyons are much more common in arid areas than in wetter areas because weathering has a lesser effect in arid zones. Canyons' walls are often formed of resistant sandstones or granite. Submarine canyons are those which form underwater, generally at the mouths of rivers. The word canyon is Spanish in origin (cañón). The word canyon is generally used in the United States, while the word gorge is more common in Europe and Australasia, though it is also used in some parts of the United States and Canada. The rare word defile is occasionally used in England.

2007-01-09 19:06:35 · answer #1 · answered by DeepBlue 4 · 0 0

A canyon (rarely cañon) or gorge is a deep valley between cliffs often carved from the Earth by a river. Most canyons originate by a process of long-time erosion from a plateau level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls. Canyons are much more common in arid areas than in wetter areas because weathering has a lesser effect in arid zones. Canyons' walls are often formed of resistant sandstones or granite. Submarine canyons are those which form underwater, generally at the mouths of rivers. The word canyon is Spanish in origin (cañón). The word canyon is generally used in the United States, while the word gorge is more common in Europe and Australasia, though it is also used in some parts of the United States and Canada. The rare word defile is occasionally used in England.

A famous example is the Grand Canyon in Arizona. In the southwestern United States, canyons are important archeologically because of the many cliff-dwellings built there, largely by the Ancient Pueblo Peoples.

Sometimes large rivers run through canyons as the result of gradual geologic uplift. These are called entrenched rivers, because they are unable to easily alter course. The Colorado River and the Snake River in the northwestern United States are two examples of this.

Canyons often form in areas of limestone rock. Limestone is to a certain extent soluble, so cave systems form in the rock. When these collapse a canyon is left, for example in the Mendip Hills in Somerset and Yorkshire Dales in Yorkshire, England.

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2007-01-10 05:10:50 · answer #2 · answered by catzpaw 6 · 0 0

A canyon = great valley. Its between cliffs and often being carved by river.Originated from the long time erosion from a plateau level.

2007-01-10 03:12:31 · answer #3 · answered by purplelotus_disember84 2 · 0 0

a big *** hole in the earth usually caused by meters along time ago

2007-01-10 03:24:56 · answer #4 · answered by lil8ball89 1 · 0 0

A big GUN

2007-01-10 03:06:43 · answer #5 · answered by QQ dri lu 4 · 0 0

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