U-shaped valley

This article is about the physical-geographic term. For places named "Valley" see Valley (disambiguation). In geology, a valley is a depression with predominant extent in one direction. A very deep river valley may be called a canyon or gorge.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, at least with respect of the cross section of the slopes or hillsides.
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