The complex terrain of Ariel is captured in this view of its southern hemisphere. Most of
the surface consists of intensely cratered terrain transected by fault scarps and graben.
Some of the largest graben, which can be seen near the terminator (at right), are partly
filled with younger deposits that are less heavily cratered. Bright spots near the limb and
toward the left are chiefly the rims of craters. Most of the brightly rimmed craters are too
small to be resolved here, although one crater about 30 km (20 mi) in diameter is easy to
spot near the center.