Thanks Doc :)
This is exactly the kind of answer I was looking for.
My mind can definitely see those lines being created by the "seasonal?" movement of an ice mass, it seems logical they would be very regular if it was some massive ice sheet moving as the whole thing gained/loss mobility. Sorry for my use of quotes, I'm under educated and playing catch up, lacking vocab still. My library didn't have the Changing Earth available but the librarian said she could get it for me so I can't wait!