Icebergs are essentially blocks of freshwater ice that have broken off from glaciers through a process called calving and floated out to sea. In fact, to be classified as such, the ice in an iceberg has to originate from glaciers or shelf ice.
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Icebergs are essentially blocks of freshwater ice that have broken off from glaciers through a process called calving and floated out to sea. In fact, to be classified as such, the ice in an iceberg has to originate from glaciers or shelf ice.