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controls the ease, or difficulty, of groundwater transmission through a porous material
a very large, thick mass of glacial ice flowing outward in all directions from one or more accumulation centers. the largest example is Antarctica
a depositional feature composed of till and only associated with continental glaciation, not with alpine glaciers
wastage of a glacier that occurs when large pieces of ice breaks off into water. this process occurs where a glacier enters the sea
a ridge of till formed when lateral moraines from two coalescing valley glaciers join
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