Ice sheets are cool.
Good facts, thanks.
It's been awhile since I had a graduate glaciology course. As I recall, the big Pleisotcene ice sheets they were so tall (and broad) that they created their own weather patterns. They were big enough to alter the geooid of the planet. And what they did to the rock below! The over-pressurized bedrock aquafers could lift large pieces of overlying strata into the glacier, where they were carried down-stream to be deposited nearly intact.