What shape is a mountain valley that has been created by a glaisher

They have a characteristic U shape, with steep, straight sides and a flat or rounded bottom (by contrast, valleys carved by rivers tend to be V-shaped in cross-section). Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring.

Its in the national history museum and you can't se the original because its locked away in a vault 

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