ice pack

Even where the sea is covered with floating ice, there are perceptible currents, and the ice-pack is never at rest.

Every few steps some man would sink into the ice-pack up to his waist and his legs would dangle in slush without finding bottom.

He ran down to the ice edge, and gazed eagerly seaward, but nowhere could he see the ice pack.

In the east the sun was just rising, and the snow of the ice pack sparkled and glittered with wondrous beauty.

In an ice-pack of big hummocks and narrow lanes we made good progress all the summer.