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Transcript of Antarctic Icebergs
How are they formed?
Icebergs are chunks of ice that have broken/eroded off a glacier or ice shelf in mainland Antarctica, in our case. They float around in the sea around the continent.
Did you know?
Icebergs are made
up of freshwater,
Icebergs can be classified according to their shape. The two basic types are tabular and non-tabular.
Tabular icebergs have steep sides and a flat top. It is very short in comparison to its length.
Non-tabular icebergs have different shapes and include:
Dome: An iceberg with a rounded top.
Pinnacle: An iceberg with one or more spires.
Wedge: An iceberg with a steep edge on one side and a slope on the opposite side.
Dry-Dock: An iceberg that has eroded to form a slot or channel.
Blocky: An iceberg with steep, vertical sides and a flat top.It differs from tabular icebergs in that its shape is more like a block than a flat sheet.
RMS Titanic embarked on its maiden voyage from Southampton to New York but collided with an iceberg on 14th April 1912 to sink a few hours later the following day.
Iceberg B-15 is the world's largest recorded iceberg. It measured around 295 km long and 37 km wide, with a surface area of 11,000 km² - larger than the island of Jamaica. After almost a decade, parts of B-15 still have not melted.
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Did you know?
Icebergs only have one ninth of their volume above the surface.
Icebergs generally range from 1 to 75m above sea-level and weigh 100,000 to 200,000 tons (metric). When a piece of iceberg melts, it makes a fizzing sound which is when the water-ice interface reaches compressed air bubbles, trapped in the ice.