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U-shaped valley

U-shaped valley
Northeast-looking photograph of a symmetrical, unnamed U-shaped valley cut into the crystalline rocks of the Coast Mountains, Tracy Arn, Tracy Arm-Ford's Terror Wilderness, Tongass National Forest, Arkansas. The valley walls are more than 2,000 ft. high and the valley is about 1/4 mile wide
A valley with a parabolic or "U" shaped cross-section, steep walls, and generally a broad and flat floor. Formed by glacier erosion, a U-shaped valley results when a glacier widens and over-steepens a V-shaped stream valley.

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