Trillion-tonne iceberg breaks off Antarctica

Trillion-tonne iceberg breaks off AntarcticaA Delaware-sized iceberg, one of the largest ever seen, was set adrift after snapping from a West Antarctic ice shelf that will be closely watched for signs of collapse, scientists said Wednesday. A crack in the Larsen C ice shelf, a drifting extension of the land-based ice sheet, finally broke through after inching its way across the frozen formation for years. It created an iceberg of about 5,800 square kilometres (2,200 square miles), with a volume twice that of Lake Erie, one of the North American Great Lakes.

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