A glacier is a perennial mass of ice which moves over land. A glacier forms in locations where the mass accumulation of snow and ice exceeds its removal over many years.
History[]
The Beta Gate found in Antarctica was dislodged from its DHD by a glacier. (SG1: "Solitudes")
There was a glacier on M44-5Y9, which broke and flooded the valley in which the planets Stargate was situated. (SGA: "The Shrine")