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Pancake ice
Pancake ice in the Ross Sea
Pancake ice is a form of ice that consists of round pieces of ice with diameters ranging from about 10 inches to 3 feet, depending on the sea/weather conditions of ice formation. It may have thickness of several inches. "Sea Ice Glossary" Pancake ice features elevated rims of nearly uniform height of up to 1 inch. The rim is formed by piling the frazil ice/slush/etc. up the edges of pancakes when they collide, both due to random bumping into each other and because of periodic compressions at wave troughs. These rims are the first indication of the onset of the formation of the pancake ice from less consolidated froms of ice. Mar 03 - Ice work - British Antarctic Survey
Pancake ice may be formed in two ways. It may be formed on water covered to some degree in slush, shuga or grease ice. Alternatively, it may be created by breaking ice rind, nilas or even gray ice in the agitated conditions.
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