How did you come up with the geography on Roshar?
Brandon Sanderson (paraphrased)
The geography on Roshar was developed as a natural outgrowth of the highstorm, which was the first concept for Roshar, which was inspired by the storm of Jupiter, which was me wanting to tell a story about a world with a continual magical storm. And then I built the ecology and all of these things up from that. Roshar had to grow up--I had to find a mechanism by which stone was deposited by rain, because I felt that the constant weathering over that long of a time would leave no continents. So the crem was my kind of scientific-with-one-foot-in-magic hack on keeping the continent. So the continent does drift. They don't have plate tectonics. The continent actually moves as it gets weathered on the east and gets pushed that direction over millennia of time.