[cripplecreek]

Isle Royale is one of my favorite landforms. It also shows why glaciers moved so far so fast in this part of the world. The rock was already folded into parallel lines and full of sediment which acted like lubricant under the glaciers.

[ETL]

Interesting, because further east, where the folding is the result of the Pangea formation process, the folds are perpendicular to the glacial grooves and scratches. I guess the folding in that region (Isle Royale region) occurred during some older tectonic collision event(s).