The water distribution system can be subject to freezing and clogging from frazil ice. Pancake ice features elevated rims formed by piling the frazil ice/slush/etc. There are several ways to control frazil ice build up. The first ice that forms in a polynya are loose ice crystals called frazil ice. The name "Frazil" is a pun on Frazil ice vs. thaw. Man-made structures are often the objects to which frazil ice adheres. Dorothea Frazil is the editor of the Oxford Mail Newspaper. The frazil ice accumulates as more gets deposited. Frazil ice formation may also be started by snowfall, rather than supercooling. In more turbulent seas, frazil crystals join together into flat discs known as pancakes.