What causes for the formation of river valleys?
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Most valleys are formed by erosion of the land surface by rivers or streams over a very long period of time. Some valleys are formed through erosion by glacial ice. ... In areas of limestone bedrock, dry valleys may also result from drainage taking place underground rather than at the surface
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- Most valleys are formed by erosion of the land surface by rivers or streams over a very long period of time. Some valleys are formed through erosion by glacial ice. ... In areas of limestone bedrock, dry valleys may also result from drainage taking place underground rather than at the surface.
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