How ice berg formed?

Answer 1

Icebergs are blocks of fresh-water ice that break off from glaciers and float out to sea. Glaciers are formed in polar regions where snowfall lasts for centuries, or even millennia, without entirely melting, and is eventually compressed into ice.

In the North Atlantic, most icebergs originate from the tidewater glaciers of Western Greenland. Compressed snow becomes firm, a granular snow, transformed eventually by pressure into a dense ice. The weight of the icecap builds, causing the ice to flow as much as 60 feet a day through openings in the coastal mountains. Most arctic icebergs melt before they ever reach the Atlantic Ocean.

We located iceberg information at the National Ice Center, a federal operational center that provides sea-ice analyses and forecasts. From their page of Iceberg links, it was a short jump to the St. John's International Ice Patrol (IIP) Iceberg FAQ. The mission of the IIP is to patrol the busy, hazardous North Atlantic shipping lanes, to protect the maritime community from icebergs and to prevent disasters ofTitanic proportions.