Free course

The oceans

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Described image
Figure 21 Sea ice growing on the surface of the ocean. (a) The first stage of ice formation is frazil ice forming a 'slick' on the surface of the sea; (b) pancake ice which has developed from the frazil; (c) older pack ice with a covering of snow; (d) the dark region is thin ice which has grown in the gaps between the older, thicker pack ice.

 4.6 The frozen seas