Quote Originally Posted by thebigspendur View Post
The Canadian Shield? At one time it was covered with the richest topsoil in the world and along came the glaciers and transported it to the midwest of the U.S. In the process the shield was scoured right down to the bedrock. If you look around up there you can find the striations in the rock which will tell you where the glaciers came from and where they went.
Yea, lots of evidence of glacial activity here. Good thing when the glaciers receded they deposited enough top soil to allow the boreal forest and also leave behind huge number of lakes and rivers. Probably the best known of these lakes is the Great Lakes.

Bob