Landforms of Glacial Erosion
1. Corrie
Read pages 102/3 in UG
a. Draw and label a diagram to show the formation of a corrie (Fig 3 page 102)
b. Rearrange the following sentences to explain the formation of a corrie:
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Frost-shattering and plucking create a steep backwall
Snow accumulates in north and east-facing hollows
The rock lip and moraine act as a dam
A corrie lake fills the rock basin after the ice age.
Snow is compacted into ice and moves downhill
The scree from freeze-thaw weathering and rocks obtained from plucking are embedded into the ice.
A rock lip is left near the front where the rate of erosion decreases
They are used in the process of abrasion which deepens the hollow and forms a rock basin
The height of the lip is increased by the deposition of moraine
As a result of rotational slip movement there is greater pressure from the ice at the base of the headwall and
the bottom of the rock basin
2. Aretes and Pyramidal Peaks
Draw a clear diagram and add labels, based on the diagram below...
Write a paragraph to explain how arêtes and pyramidal peaks are formed. Note named examples: The
Matterhorn in the Alps is a pyramidal peak, Striding Edge in the Lake District is a famous arête (google some
pictures!)