Hey all! I've been working on this map for a friend over at Giant in the Playground Forums. I don't have a whole lot of information to go on, but I'm stumped at this point.

Here's the map:
stumped_in_vengar_by_kungfuamadeus-d4ndelb.jpg

I find myself wondering what kind of plate tectonics would have created these landmasses, and what that means for the mountain ranges on the continents. Does anyone have any opinions?