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Which process forms a 'cirque'?
- River erosion
- Glacial erosion
- Wind erosion
- Coastal erosion
Answer: Glacial erosion
A cirque is a bowl-shaped depression formed by glacial erosion at the head of a valley glacier. It has steep walls and may contain a tarn (small lake) after the glacier melts. Cirques are common in the Himalayas and Alps.