Horn: A pyramid-like peak formed by glacial action in three or more cirques surrounding a mountain summit.
Cirque: An amphitheater-shaped basin at the head of a glaciated valley produced by frost wedging and plucking
Hanging Valley: A tributary valley that enters a glacial trough at a considerable geight above the floor of the trough.
Glacial Trough: A mountain valley that has been widened, deepened, and straightened by a glacier.
Arete: A narrow, knifelike ridge separating two adjacent glaciated valleys.
Fiord: A steep-sided inlet of the sea formed hen a glacial trough was partially submerged.
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