EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ICEBERGS
A massive piece of ice of greatly varying shape, protruding 5 m or more
above sea- level, which has broken away from a glacier and which may be
afloat or aground. They may be described as tabular, domed, pinnacled,
wedged, drydocked or blocky. Sizes of icebergs are classed as small,
medium, large and very large.
Canadian Ice Service - Environment Canada