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Difference between continental glaciers and valley glaciers? Continental glaciers are known as ice sheets and cover extensive  areas of Antarctica and Greenland. Valley glaciers come from these  ice fields or mountain glaciers and sliâ¦de down the mountainsides  like long ribbons.
Glaciers and glacial erosion. A glacier is mass of land ice so large that it flows downhill under its own weight. Glaciers develop in cool, wet areas where at least some of the snow that falls during one winter does not melt or evaporate by the next. Masses of snow and ice typically accumulate at the upper ends of valleys on peaks like Mount Shasta and, when the become thick enough, flow down these valleys as glaciers (Figure 10) .