Glaciers & Icebergs
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A glacier is a large body of ice moving down a slope or valley slowly. Sometimes glaciers spread outward on a land surface. Glaciers are moving mass or a river of ice formed by the accumulation of snow compacted over time on mountains or near the North or South Pole. 99% of glacier ice is contained within vast ice sheets known as continental glaciers in the polar regions. Glacier ice is the largest reservoir of fresh water on Earth.
An iceberg is a block of ice that has broken off from the face of a glacier and is floating in a body of marine water.