The surface features on these flows are similar to those developed on basaltic flows on Earth. Clearly, the scarp in this area is older than the flows, indicating that at least the youngest flows in the mountain occurred after scarp formation. In this region, the Olympus Mons flows make up the plains surface at the foot of the scarp. However, in other areas, Olympus Mons flows have been overlain by the smooth-surfaced material of the plains. The image is about 110 km across.
North is to the top of the image.
The image at right graphically portrays the ruggedness of the scarp. The image is about 80 km across. North is to the right of the image.