Icebergs

Icebergs are large mounds of ice calved (broken off) from a glacier.  Most icebergs come from Antarctica and Greenland. All North American bergs come from the Great Greenland ice sheet. Wind and ocean currents can move icebergs many kilometers from their original place. One of the largest icebergs measured was 333km. Long and 96km. wide. Icebergs can reach the height of 90 to 150m. above the surface of the sea, although about 90 percent of an iceberg is underwater. It melts and melts until it finally is no longer visible.
 
 

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