glacial trough
a large u-shaped valley formed from a v-shaped valley by glacial erosion.
glacial_trough.jpg

Western Brook glacial trough, Newfoundland, Canada. The sheer walls of this glacial trough soar up to 700 m high, and the glacial basin is 500 m deep in places.

Natural Resources Canada, copyright Terrain Sciences Division, Geological Survey of Canada
Topic(s):
glaciers

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