As we cruised through the icebergs, the Expedition Team educated us as to the "lingo" of icebergs. We saw many Growlers - floating ice which is 3 feet or less above the sea surface. Often Growlers are old, clear and very hard. An iceberg itself, is ice which has calved from a glacier, ice sheet or ice cap, which is at least 15 feet above the surface. A Glacier is ice which is moving over land. An Ice Shelf is an area of thick flat ice which is attached to land. A crevasse is a crack in a glacier caused by the movement of the ice as it moves downhill. Crevasses can be incredibly blue in color - often neon blue. Typically only 10-20% of the iceberg is above water and it is difficult to judge the shape or size of the underwater portion of the iceberg. The largest iceberg reported was the height of a 55 story building!
I apologize in advance for the fact that you will see many more pictures in my other posts. Icebergs are absolutely incredible!