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The rate of movement is determined by: * Amount of basal debris: (More debris will slow it down). * Amount of basal meltwater: (More meltwater will speed it up, however if there is too much meltwater, the glacier will simply 'buoy up' and not move at all). * Gravity. * Gradient: (Steeper gradient, faster movement). * The thickness of ice: (Which influences basal temperature and pressure melting point). * Internal temperature of the ice. * The glacial buget: (positive budget, faster rate of movement). * Surges: (such as avalanches greatly increase the speed of a glacier).

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