<P> An iceberg or ice mountain is a large piece of freshwater ice that has broken off a glacier or an ice shelf and is floating freely in open water . It may subsequently become frozen into pack ice ( one form of sea ice ) . As it drifts into shallower waters , it may come into contact with the seabed , a process referred to as seabed gouging by ice . Also , about 91 % of an iceberg is below the surface of the water . </P>
<P> An iceberg or ice mountain is a large piece of freshwater ice that has broken off a glacier or an ice shelf and is floating freely in open water . It may subsequently become frozen into pack ice ( one form of sea ice ) . As it drifts into shallower waters , it may come into contact with the seabed , a process referred to as seabed gouging by ice . Also , about 91 % of an iceberg is below the surface of the water . </P>
what portion of an iceberg is below the water surface
what portion of an iceberg is below the water surface
91 %
91 %