Arêtes and pyramidal peaks
A view of the Himalayas showing an arête and pyramidal peak
An A sharp ridge of rock separating two corries. is a knife-edge A long and narrow chain of mountains.. It is formed when two neighbouring corries run back to back. As each glacier erodes either side of the ridge, the edge becomes steeper and the ridge becomes narrower.
U-shaped valley in Hola Valley, Norway
A A sharply pointed mountain peak that has been formed by glaciation. is formed where three or more corries and arêtes meet. Glaciers erode backwards towards each other, carving out the rocks by A type of glacial erosion that occurs when ice freezes onto the landscape, ripping out rocks when it moves. and abrasion. Freeze thaw weathers the top of the mountain, creating a sharply pointed The top of a mountain..
