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Glaciers are massive bodies of flowing ice. They are found in cold region where snow does not melt.
Glaciers slowly move downwards, changing the shape of the topography as they go.
Glaciers that move downwards carve out U-shaped valley as they slide.
Above a certain height snow never melts. This is called the snow line. Glaciers always form above this line.
The Siachen glacier separates India and China.