What are the "step like" features on the mountains around the great wall?

Question

What are the "step like" features on the mountains around the great wall of China. Are they do to erosion or are they human made?

Answer 1

They are due to erosion. The features are called cuestas or hogbacks and are created when the strata are tilted and then weather differently depending upon the rock type of each layer.
Wikipedia has a good summary:

http://en.wikipedia.org/wiki/Cuesta