valley
Sign in to saveA valley is an elongated low area often running between hills or mountains and typically containing a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas.
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A valley is a low area of land that typically runs between hills or mountains and often contains a river or stream flowing through it. Valleys form mainly through the erosive action of rivers, streams, or glaciers wearing away the land surface over long periods of time.
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Article
25 sectionsContents
- Formation of valleys
- Glacial valleys
- Tunnel
- Meltwater
- Transition forms and shoulders
- Hanging tributary{{anchor|Hanging_valleys}}
- Trough-shaped
- Box
- Rift
- Terms for valleys
- British regional terms for valleys
- Human settlement
- Notable examples
- Africa
- Asia
- Oceania
- Europe
- North America
- South America
- Antarctica
- Extraterrestrial valleys
- See also
- References
- External links
- Extraterrestrial valleys
A valley is an elongated low area often running between hills or mountains and typically containing a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas.
At lower latitudes and altitudes, glacially formed valleys may have been created or enlarged during ice ages but now are ice-free and occupied by streams or rivers. In desert areas, valleys may be entirely dry or carry a watercourse only rarely. In areas of limestone bedrock, dry valleys may result from drainage now taking place underground rather than at the surface. Rift valleys arise principally from earth movements, rather than erosion. Many different types of valleys are described by geographers, using terms that may be global in use or else applied only locally.