AS17-3075 (P)
                                                      Figure 67                                            Figure 83

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The arcuate ridges shown here are part of the large crater Lambert R (See blow-up of Fig. 67) , which is mainly deeply buried and now outlined by mare ridges and a few isolated remnants of the original rim. This is one of many examples in which underlying topography is reflected by mare ridges, thereby suggesting a causal relationship. The ridge segments at A are probably caused by solidification and sagging of the mare lavas over the crater rim. Crustal buckling caused by sagging of the lava inside the crater rim may have formed the inner ridges B and C. The exact origin of mare ridges is still debatable.   -C.A.H.

Report Source: NASA SP-362, Page 93, Figure 83

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