BERG MATERIAL is a term used to describe the material that makes up glaciers and icebergs. It is composed of snow, ICE, and other frozen materials such as rocks, dust, and air bubbles. Icebergs are large chunks of ICE that have broken off from glaciers and are floating in the ocean. Glaciers are large masses of ICE that move slowly over land, often carving out valleys and other features in the landscape.