- With increasing snow fall, ice accumulates in a pre-existing depression on a glaciated
mountain.
- The ice freezes in rock joints / cracks at the bottom of the depression
- Glacial plucking takes place with the ice freezing in the cracks, widening them and
breaking the rocks.
- The melt water removes the weathered materials deepening the hollow
- Melt water also freeze into cracks on the back wall and through the process of basal
sapping rocks are removed, maintaining a steep back wall.
- The floor of the basin is further deepened by abrasion using both materials from the
back wall and the basin floor.
- The rock debris on the floor are then removed add deposited at the edge of the basin.
- When the ice thaws, it reveals a basin resembling an arm-chair
- This is a cirque
Kavungya answered the question on June 4, 2019 at 12:42
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