Glacial Formations


	Internal Deformation Interglacial Flow	Extending Flow
	Individual ice crystals re-orientate Cool-based glaciers move by internal deformation as they are unable to move by basal sliding If the relief is steep, the glacier can't deform quick enough to move over the obstacles, causing the base to shatter, forming crevasses	Ice pulls away from the ice behind which it hasn't reached the steeper slope
	Compressing Flow	Why do they Move?
	Ice thickness and flowing ice pushed over the slow-moving leading ice	Gravity - causes movement downhill Gradient - steeper gradient causes a glacier to move faster Ice thickness - Influences basal temperature and pressure melting point Ice temperature - allows ice to move relative to other ice Glacial budget - A positive budget causes the glacier to advance Pressure melting point - the temperature at which ice is on the verge of melting

Individual ice crystals re-orientate
Cool-based glaciers move by internal deformation as they are unable to move by basal sliding
If the relief is steep, the glacier can't deform quick enough to move over the obstacles, causing the base to shatter, forming crevasses

Gravity - causes movement downhill
Gradient - steeper gradient causes a glacier to move faster
Ice thickness - Influences basal temperature and pressure melting point
Ice temperature - allows ice to move relative to other ice
Glacial budget - A positive budget causes the glacier to advance
Pressure melting point - the temperature at which ice is on the verge of melting

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