Glacier — A massive body of land-formed ice moving slowly down 



a mountainside or valley. 



Glacial (Glacier) Ice — Ice which originates from glaciers. 



Glacon — A piece of sea-ice ranging in size from brash to medium 



floe (6 to 2,000 feet across). 



Grease Ice — Slush ice formed from the congelation of ice crystals 



in the early stages of freezing. 



Growler — A small piece of dense glacier ice usually green in color 



and barely showing above the water. 



Growler Ice — An accumulation of growlers. 



Heavy Ice — Any pack ice more than 10 feet thick. 



Hummocked Ice — Ice piled haphazardly into the form of a short 



ridge or hillock. 



Ice Barrier — See Barrier. 



Iceberg — See Berg. 



Ice Blink — A yellowish-white glare on the underside of extensive 



cloud areas created by light reflected from ice-covered surfaces. 



Ice Cap — An ice sheet of vast extent covering the topographic 



features of a continental land mass. 



Ice Field — See Field. 



Ice Foot — A wall or belt of fast sea-ice formed along a shore not 



subject to rise and fall of tides. 



Ice Sky — See Ice Blink. 



Land Sky — Dark streaks, patches, or a grayness on the underside 



of extensive cloud areas due to the absence of reflected light from 



bare ground. 



Lead (Lane) — A long, narrow but navigable water passage in 



pack ice. 



Medium Floe — See Floe. 



Nipped — As applied to a ship, caught and held tightly by sea-ice 



under pressure. 



Nunatak — An isolated hill or mountain of bare rock rising above 



the surrounding ice sheet. 



Open Water — Sea areas less than one-tenth covered with floating 



ice. 



Pack Ice (The Pack) — Any large area of floating sea-ice driven 



closely together. ( See Arctic Pack. ) 



Pancake Ice — Piece of newly formed sea-ice about 1 to 6 feet in 



diameter. 



Permafrost — Permanently frozen soil, rock or bedrock. 



XI 



