Predominantly circular pieces of ice from 30cm to 3m in diameter and up to about 10cm in thickness, with raised rims due to the pieces striking against one another.
new ice about 0.3 to 3 m in diameter, with raised rims about the circumference from striking other pieces
circular flat accumulations composed of frazil and slush ice with a raised rim; the shape and rim are due to repeated collisions
Pancake ice grows from thickened grease ice and resembles pancakes or lily pads. The edges of each piece is upturned because the plates bump into each other as they gently move around in the sea. Usually between about about a foot (30cm) and 6 feet (2m) across. Pancakes tend to be smaller the closer to the shore line they are. Sea-water
pieces of new ice approximately circular, up to 10 centimeters (4 inches) thick and 0.03 to 3 meters (0.1 to 9.8 feet) in diameter, with raised edges that form from rubbing against each other; formed from the freezing together of grease ice, slush or shuga, or the reaking up of ice rind or nilas. (Photo courtesy of the National Oceanic and Atmospheric Administration/Department of Commerce.)