Glacial Erosional Landforms

Question 1

Corrie

Answer 1

Deep, hollow in mountainside

Formed by rotational slip of glacier causing abrasion and plucking. Exacerbated by basal slip due to gravity

Question 2

Arete

Answer 2

Sharp ridge on side of mountain from corries eroding alongside eachother

Question 3

Pyramidal Peak

Answer 3

3+ Corries eroding a mountainside back-to-back creates a sharp pyramid point

Question 4

Truncated Spurs

Answer 4

Glacier erodes a series of interlocking spurs

Question 5

Hanging Valley

Answer 5

Smaller valley hanging above main one due to smaller glacier travelling horizontally to bigger glacier and not eroding as far down

Question 6

Ribbon Lakes

Answer 6

Areas of softer rock in valley floor eroded more deeply than other creating a hollow

Hollow is filled by meltwater during retreat leaving a long narrow lake in place

May be dammed by a moraine further trapping water and contributing to the formation of the lake