Iran Earthquake - Standard Blind Thrust
In this neck of the woods, mountains are there for a reason. It is a sign of compression. It gets a lot worse up in the 'stan' countries. So you have mountains and you have valleys. The mountains are the footwalls of thrust faults, and the valleys are the chewed-up hanging walls. It's the same geometry around Toronto.
This shows the pure thrust. In the hanging wall (the