Glaciers are “rivers” of ice which too erode the landscape by bulldozing soil and stones to expose the solid rock below.
When glaciers moves below the mountain, it carries along rocks, sand and stones and these materials carve out deep hollows.
As the ice melts, these hollows gets filled up with water and become beautiful lakes (called tarn or corrie lakes) in the mountains.
The material carried by the glacier such as rocks big and small, sand and silt gets deposited. These deposits form glacial moraines.
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