They had phrases for slush, thicker
grease ice, new black ice, skim, pancake, transition, and column ice, thin ice that bends with wave action, thicker ice that gathers from winds; ice that forms from rough water, ice that is a parfait of layers, gray ice that breaks easily, more durable gray-white ice, snow ice, heavy blue glacial ice, and cracking ice that is dangerously separating.