Okay, I have been thinking about this, and I think that Antarctica's presence in Pangaea is a solution to another problem I have been having.
Now, we all know about the ice wall, a 150 foot tall barrier from whatever is 'outside' but how did it form?
One theory is that water cascading into the depth of space lost it's heat, as there is no sun there to add energy to the atoms, causing them (eventually) to slow and the water to change to ice.
But wait, why is the Ice Wall 150 feet high IF the only thing that was added to it was water cascading over the edge? Surely the wall wouldn't rise over the water level, except possibly a little, as particularly large waves crashed into it and left water to freeze over, but still 150 feet?
Perhaps, as Antarctica seperated, and moved to where it is today, it's mass pushed the edges of the Ice Wall up, causing it to rise above the surrounding ocean?
This is my new theory. Help me work out the details.