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Corrie

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A corrie (also known as a cirque or cwm) is a bowl- or amphitheatre-shaped landform formed by glacial erosion. Snow settles in the flatter part of a slope on the opposite side to where the prevailing wind blows from. Eventually, a glacier will form here. Plucking on the back wall and abrasion on the floor makes the shape larger and more like a corrie. The rotational flow also creates this shape. The glacier may overflow although moraine will probably be left where the corrie ends.

Red Tarn in the Lake District is a classic example of a corrie lake. Steep scree walls rise 300m to the arete above (known as Striding Edge) and to the summit of Helvellyn.

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