cirque

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cirque

1. Geography a semicircular or crescent-shaped basin with steep sides and a gently sloping floor formed in mountainous regions by the erosive action of a glacier
2. Archaeol an obsolete term for circle

Cirque

 

a natural bowl-shaped depression near the summit of a mountain, with steep rocky walls and a sloping concave bottom. It is formed by the action of small glaciers, snow fields, and subsequent frost weathering. Some cirques have permanent glaciers or firn accumulation; others have seasonal accumulations of snow, and very often the cirque bottom is filled with water(high-mountain lakes).

cirque

[sərk]
(geology)
A steep elliptic to elongated enclave high on mountains in calcareous districts, usually forming the blunt end of a valley. Also known as corrie; cwm.