Corries are armchair-shaped hollows, which are found high up on the sides of hills. They are often formed on the shaded and therefore colder side of the hill. Here the snow does not melt as fast and there can be a build up of snow which is squashed and turned into ice. As the ice moves downhill it erodes the underlying rock, eventually producing a corrie.

Often two or more corries are formed leaving a narrow ridge between them. This is called an arete. When a hill has been heavily eroded with 3 or 4 corries the jagged hill that is left is known as a horn or pyramidal peak.

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