The word you want is glacier.
Also called ice sheets, they can be called glaciers or continental ice masses. While glaciers, by definition, have to be moving- albeit VERY slowly- ice sheets can just lay there until they move, which could classify them as a glacier.
It could then all disappear
The cast of Moving Slowly - 2011 includes: Zoe Biggs as Sister
Material with high resistance
due to inerita
Because they are moving very slowly.
The term for a slowly moving mass of ice is a glacier.
California is slowly moving south, toward the Gulf of Mexico.
its sleeping....
cos its cold
Glaciation
moving or progressing very slowly