How do glaciers primarily contribute to weathering and erosion?

Answer

Grinding away bedrock due to their immense weight combined with embedded rock debris.

Glaciers, being large rivers of ice, exert tremendous weight, and the rock debris embedded within the ice grinds away the bedrock beneath them as they flow, eroding the landscape on a massive scale.

How do glaciers primarily contribute to weathering and erosion?
Geologylandscapeerosionprocessform