Glacier Landforms: Trough

Western Brook glacial troughWestern 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. —Source: Natural Resources Canada. Unattributed photograph. Copyright Terrain Sciences Division, Geological Survey of Canada.

Western Brook glacial troughAerial view of Western Brook glacial trough, Newfoundland, Canada. In preglacial time, this gorge was a normal river valley near sea level. As the plateau was altered during the Ice Age, powerful outlet glaciers deepened and widen the valley. –Source: Natural Resources Canada. Unattributed photograph. Copyright Terrain Sciences Division, Geological Survey of Canada.