It is a form of bergy bit, or a crevasse wall breakaway.
2.
They're excitedly eyeing big icebergs and their smaller cousins, " bergy bits " and " growlers ."
3.
But safety in this race is paramount, and if we do see ice, it will be apt to be more like bergy bits.
4.
Once a piece has calved, it's classified as a growler if it's as big as a piano; a bergy bit if it's the size of a " small cottage "; or an iceberg if it's larger.
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