Valley

Valley

A valley is a low area between hills or mountains typically with a river running through it. In geology, a valley or dale is a depression that is longer than it is wide. The terms U-shaped and V-shaped are descriptive terms of geography to characterize the form of valleys. Most valleys belong to one of these two main types or a mixture of them, with respect of the cross section of the valleys.

Formation

Valleys are formed through various geological processes. These include erosion by water, river, and glacier. The mechanism of formation is usually erosion by water, wind, and ice. The process of erosion usually occurs over a long period of time, often over millions of years.

Types of Valleys

There are various types of valleys, each with its unique characteristics. These include:

• Rift Valley: These are formed by plate tectonics and are typically found in locations where the Earth's crust is being pulled apart.

• River Valley: These are formed by the erosive activity of a river over a long period of time.

• Glacial Valley: These are formed by the action of glaciers. They are typically U-shaped.

See also

• Canyon
• Gorge
• Dell (landform)
• Hollow (landform)
• Water gap

References

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External links

• Valley at Encyclopædia Britannica

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