part of attached to object shore marine bed fast ice 2019-01-14T20:41:13Z Fast ice is central to the livelihoods of Arctic coastal communities who use it to access fishing and hunting grounds. Vertical fluctuations may be observed during changes of sea level. Fast ice may be formed on site from sea water or by freezing of pack ice of any age to the shore, and it may extend a few yards (meters) or several hundred miles (kilometers) from the coast. Fast ice may be more than one year old and may then be prefixed with appropriate age category (old, second- year, or multiyear). If it is thicker than about 7 ft (2 m) above sea level, it is called an ice shelf. A mass of sea ice which 1) is less than 2 meters in thickness and 2) forms along the coast, where it is attached to the shore, to an ice wall, to an ice front, or between shoals or grounded icebergs. http://sweetontology.net/realmCryo/FastIce sea ice mass system anatomical structure