AS17-2313 (P) Figure 75
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         Figure 74                                             Figure 75

Click here for larger NASA version of Fig. 74
 Click here for larger NASA version of Fig. 75
Click here for lunar chart showing location

This (right) and the next six pictures are enlargements of specific areas to show the detailed form of the mare ridges seen at much smaller scale in figure 74. Here can be seen a small segment of the most prominent ridge enlarged about 45 times. When seen in detail, the ridge is spectacularly crisp and well formed. The main ridge here is shaped like a string of sausages. Smaller wormy ridges appear on either side. Cracks in the top of the ridge probably formed by buckling of the mare lavas. As the following figure show, most other parts of the ridge are less symmetrical than this part.   - K.A.H.