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Also known as dale, river valley

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.

AI overview

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.

AI-generated from the Wikipedia summary — may contain errors.