Origin of ice island
Examples from the Web for ice island
"Possibly they may bear up through the channel to the west of the ice-island," said Raed.
None slept, and the night wore slowly away as our ice-island floated we knew not whither.North-Pole Voyages|Zachariah Atwell Mudge
We thus had the ice-island between us and the possibly hostile ship.
The distance across the ice-island here can't be much under two miles and a half.