Figure 126                                               Figure 127

 Click here for larger NASA image of Figure 127
 Click here for larger NASA image of Figire 126
 Click here for lunar chart showing location

A secondary Copernicus crater chain is enlarged in this view. Its elongate shape, the irregular form of the individual craters, and the splashed appearance of their ejecta are clearly discernible. Also present in this view are two or three groups of craters (arrows) that are also of secondary impact origin, but are different from the Copernicus chain. They occur in clusters, not chains. The craters within the clusters are smaller and more regular in shape and do not have the splashed appearance of the Copernicus secondaries. At arrow 2, some of them are superposed on-and hence are younger than-the Copernicus chain. A few have faint herringbone ridges that veer toward the west, indicating that the primary crater lies in that direction. Except for the familiar crater Aristarchus (Figure 165 ), which is 580 km west of this area, there are no other large craters that are also young enough to have been the cause of these secondaries. Aristarchus is, furthermore, younger than Copernicus. For these reasons Aristarchus crater is the most likely source of the material that landed here to form the clusters of craters.   -G.W.C.

Report Source: NASA SP-362, Page 130, Figure 127

This web page was created by Francis Ridge for The Lunascan Project
Section Directory 20
Home Page