AS16-4653(P)
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The secondary crater cluster near the lower edge of  Figure 128  is enlarged to show more detail. The largest crater within the cluster is about 600 m wide. The small, sharp, circular craters are primary craters that postdate the cluster. Some poorly defined V-shaped ridges at the south edge of the cluster point southward toward the primary crater. The effects of the secondary cratering are much more extensive than was apparent in the smaller scale picture. The finely lineated terrain west and north of the cluster is caused by a great many parallel and subparallel ridges, gouges, grooves, and barely visible small irregular craters. They are apparently caused by the impact and deposition of material ejected from the secondary craters. Craters formed during this stage are tertiary craters but are rarely distinct enough to be recognized. Several possible examples are indicated by arrows.   -H.J.M.