Glacier Movement

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Internal Deformation
Ice crystals orientating in the same direction, causing the ice to slide along the surface. As this moves faster, crevasses will begin to form.
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Rotational
Round movement which occurs as the corrie (highest sectoin of glacier) and can go beyond rock lip
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Compressional
When a valley (which the glacier is flowing in) has a decline in gradient, this thickens the ice leading to a deceleration in the movement and an increase in erosion
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Extensional
When a valley (which the glacier is flowing in) has an increase in gradient, this thins the ice leading to an acceleration of ice movement and less erosion
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Basal sliding
When the base of a glacier melts a small amount, causing lubrication
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Surge
An excessive build up of meltwater causing the ice to rapidly surge forward (perhaps by 250 yards), causing problems for settlements past the snout
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Other cards in this set

Card 2

Front

Round movement which occurs as the corrie (highest sectoin of glacier) and can go beyond rock lip

Back

Rotational

Card 3

Front

When a valley (which the glacier is flowing in) has a decline in gradient, this thickens the ice leading to a deceleration in the movement and an increase in erosion

Back

Preview of the back of card 3

Card 4

Front

When a valley (which the glacier is flowing in) has an increase in gradient, this thins the ice leading to an acceleration of ice movement and less erosion

Back

Preview of the back of card 4

Card 5

Front

When the base of a glacier melts a small amount, causing lubrication

Back

Preview of the back of card 5
View more cards

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