glacier move at approximately 2 cm per day. even though that isn't much, glaciers constant;y take with them dirt and sediments from the ground, eroding it. this could also be weathering.
A glacier is nothing more than a frozen river still moving. It might only move an inch or two per year, but it still moves and this ice will erode the ground and rock below it faster and more...
Glaciers are huge chunks of snow and ice most time more than 1000 feet thick. They weigh huge amount and overtime become so condensed that they are harder than the rock they are on top of. They move...