Glacial Formations


	Corrie	Arête
	Snow accumulates on slope Ice grows into rock (nivation) More accumulation Mass increases, causing it to move downhill Takes the rock with it Leaving a hollow Rotational movement of material causes plucking, making it steeper Debris from plucking and weathering helps to abrade the hollow making it deeper	Two corries back to back
	Pyramidal Peak	U Shaped Valleys
	3 or more worries back to back on a mountain	As the glacier moves out of the corrie it causes the valley shape to change from a V to a U Plucking and abrasion occur, causing the valley to deepen and widen Can't flow past interlocking spurs, so instead cut through them, forming steed truncated spurs

As the glacier moves out of the corrie it causes the valley shape to change from a V to a U
Plucking and abrasion occur, causing the valley to deepen and widen
Can't flow past interlocking spurs, so instead cut through them, forming steed truncated spurs

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