geography - formation of a corrie

Question 1

1 - north facing hollows

Answer 1

snow collects in the north facing hollow of a mountain, when more snow falls in winter than melts in summer.

Question 2

2 - glacier

Answer 2

Accumulation of snow then compresses into ice. This snow then starts to move downhill due to gravity.

Question 3

3- rocks fall loose

Answer 3

Frost shattering can cuase small rocks at the top of the mountain to weaken/become loose. (remember to explain frost shattering)

Question 4

4 - plucking

Answer 4

The backwall is steepened by plucking (*explain what plucking is)

Question 5

5 - abrasion

Answer 5

The hollow is deepened by abrasion. (*explain what abrasion is)

Question 6

6 - rotational sliding

Answer 6

Rotational sliding deepens the central part of the hollow (the rotational omvement of ice around a point) as gravity cuases the ice to move.

Question 7

7 - friction

Answer 7

Friction cuases ice to slow down at the front edge allowing a rock lip to form.

Question 8

8 - after ice melts

Answer 8

After the ice melts it can leave a small corrie, lochan/tarn behind.

Question 9

example

Answer 9

Example: Corrie Fee - cairngorms