Growlers are smaller fragments of ice that are roughly the size of a truck or grand piano. Its height is generally greater than 3 feet (1 meter) but less than 15 feet (5 meters) above sea level, and its area is normally about 300-900 square feet (100-300 square meters). They can originate from glaciers, shelf ice, or may be the result of a large iceberg that has broken up.Ī bergy bit is classified as a medium to large fragment of ice. Smaller pieces of ice are known as bergy bits and growlers. However, there are also striped icebergs due to different colored earthy materials becoming imbedded in the ice during its formation. The light blue is due to the scattering of blue light, much the same way the sky is blue. The white color is from the snow sitting on the berg. Icebergs are typically white or light blue. The height must be greater than 15 feet (5 meters) above sea-level, the thickness must be 95-160 feet (30-50 meters), and the area must cover at least 1,500 square feet (500 square meters). To be classified as an iceberg, the ice must originate from glaciers or shelf ice. In the Antarctic, large, and sometime enormous, flat-topped chunks of ice break off off ice shelves and are called tabular bergs.
Icebergs in the Arctic regions are formed from mountain glaciers and are typically high and narrow. Called castle bergs, the above-water shapes resemble towers. The Arctic produces 10,000 to 50,000 icebergs annually and they normally have a four-year life-span. They are found in both the Arctic and Antarctic regions but differ in form and size from each region. Icebergs are blocks of fresh-water ice that break off from glaciers, a process called "calving", and float out to sea.
Titanic was not the first ship to strike an iceberg nor was it the last. Of the estimated 2,227 passengers on board, only 705 survived. It sank 2 hours, 40 minutes later at 2:20 a.m. April 14, 1912, on a moonless, clear night with calm seas, RMS Titanic, billed as "practically unsinkable", struck an iceberg in the North Atlantic Ocean.
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