True,where glaciers exist they are far more effective agents of erosion, transportation, and deposition than running water.
Where glaciers are present, they are much more potent than flowing water as agents of erosion, movement, and deposition. Glaciers have the ability to sculpt and carve landscapes by eroding the ground under them and depositing rocks and silt. Glaciers can shape the landscape through erosion, or the removal of rock and silt.
Glaciers can also erode sediment. The sediment may move because of the weight of the ice, the glacier's ice may slide lower into the sediment, or the water in the sediment may freeze to the glacier's base. Glaciers can alter the landscape by laying down stone and sediment. As the ice melts, rocks, sediment, and other debris that were previously contained by it are released. It is possible for the glacier's base ice to melt and deposit.
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