has member composed primarily of ice field sea ice sea ice field 1 2019-01-17T17:00:31Z floating ice field An ice field which is primarily composoed of sea ice floes greater than 10 kilometers across. The floes in a sea ice field must be greater than 10 km across, at least at one location in the field. http://sweetontology.net/realmCryo/IceField ice floe