One of the more geologically-inclined can correct me if I'm wrong.
But that red rock, to my untrained-amateurish eyes, looks like the same red rock that covers most of Northern Ontario too.
That is... the rock dubbed The Canadian Shield.
Once you get... say... 3-4 hours north of Toronto... you can't move 20 feet without running into 10s-of-meters-thick slabs of this red rock everywhere. For thousands of miles.