Frazil ice is a collection of loose, randomly oriented ice crystals a millimeter and sub-millimeter in size, with various shapes, e.g., elliptical disks, dendrites, needles and of an irregular nature. Frazil ice forms during the winter in open-water reaches of rivers as well as in lakes and reservoirs, where and when the water is in a turbulent state, which is in turn induced by the action of waves and currents.
Frazil ice is a collection of loose, randomly oriented ice crystals a millimeter and sub-millimeter in size, with various shapes, e.g., elliptical disks, dendrites, needles and of an irregular nature. Frazil ice forms during the winter in open-water reaches of rivers as well as in lakes and reservoirs, where and when the water is in a turbulent state, which is in turn induced by the action of waves and currents.
Source: Wikipedia "Frazil ice" · CC BY-SA 4.0
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