What causes glaciers to move?

Answer:

Once the depth of snow and ice reaches more than 30 to 40 meters, gravity begins to pull the glacier down hill.


Also as the glacier melts due to pressure if creates melt water which acts as a lubricant.
First answer by ID1262418020. Last edit by Coulson94. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].