Geology
The bulk of the volcano's surface consists of lava flows of the early Amazonian age. The northern flanks of the volcano are highly faulted with grabens and normal faults concentric to the volcano's summit caldera. To its lower east flank, there is a chain of elliptical, or oval-shaped, pits, lined up down the center of a shallow trough. They were both formed by collapse associated by faulting – the scarp on each side of the trough is a fault line. (Such features are normally found when the ground is moved by molten rock or tectonic forces.)
Read more about this topic: Pavonis Mons