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Glaciated Landscapes 1 (inputs (avalanche, freeze-thaw weathering,…
Glaciated Landscapes 1
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cold-based glaciers
usually found at high latitude locations and in places of flat relief, the ice remains frozen at the base consequently there is little water or movement
very little erosion results. polar glaciers may advance only a few meters a year example include Greenland / Antarctica
moulin
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this means that the friction is reduced, melt-water may also enter the surface through a moulin. local increased from pressure caused by a smaller obstacle results in an increased melting meaning more slippage occurs
internal deformation
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ice crystals become flattened and so slide over each other in a movement called inter-granular slip. meaning the ice deforms and flows like putty
if the ice flows in layers this process is called laminar flow. the combined movement allows the ice to move down-slope under the effect of gravity
extending flow: steep relief of the landscape, the resultant force is gravity and so the faster the ice flows.
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