The caisson type quickly became the preferred type of lighthouse to be built in climates where ice floe damage was a possibility.
The station is built on a granite caisson with a unique shape designed to protect it from ice floes and river debris.
Its pointed end is directed toward the mouth of the river to break river-powered ice floes.
During the night the ice broke up, leaving the men adrift on an ice floe and separated from their sledges.
They knew that the north-west passage was somewhere in the ice floes.
He travels across ice floes, tundra, and mountains, haunted along the way by a dream of a long-ago self whose adventures parallel his own.
He s about to give up when he sees it drifting away on an ice floe.
The sea in this gulf is frozen for about nine months every year and often clogged with ice floes.
