Geography Revision

Explain the formation of a corrie (4) – 2024

• Snow collects in a hollow and the bottom layer turns into ice. (1)

• The ice begins to move downhill and the hollow is eroded. (1)

• Rocks stuck in the ice scrape the bottom of the hollow – abrasion. (1)

• The ice freezes onto rock and pulls it away as it moves – plucking. (1)

• This leaves a deep hollow with a steep back wall. (1) – Extra

Explain the formation of a pyramidal peak (4) – 2021

• Snow collects in three or more hollows around a mountain. (1)

• The snow turns into ice and forms a glaciers which move downhill due to gravity. (1)

• The glaciers erode backwards towards eachother using the processes of plucking and abrasion. (1)

• Sharp ridges (aretes) form and meet to create a pyramidal peak. (1)

Explain the formation of an arete (4) – Never been asked before

• Snow collects in two or more hollows side by side or back to back. (1)

• The snow turns into ice and forms glaciers which move downhill due to gravity. (1)

• The glaciers erode backwards towards eachother using the processes of plucking and abrasion. (1)

• A narrow steep ridge forms between the two hollows. (1)