Figure 128                           Figure 129
 Click here for larger NASA image of Figure 128
Click here for larger NASA image of Figure 129
Click here for lunar chart showing location

The secondary crater cluster near the lower edge of  Figure 138  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.


Report Source: NASA SP-362, Page 132, Figure 129

This web page was created by Francis Ridge for The Lunascan Project
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