File:Dobrovolskiy Shirakatsi craters p148a.jpg

English: The craters Shirakatsi (left) and Dobrovol'skiy (right), on the far side of the moon. This is the first photo of Figure 148 of Apollo Over the Moon (NASA SP-362, 1978), which has the following caption (edited for clarity because the two craters were not formally named at the time of publication):
This pair of overlapping medium-sized craters illustrates some of the criteria used to determine relative ages. Material ejected from the larger polygonal crater (Shirakatsi) on the left partially fills the smaller crater on the right (Dobrovol'skiy); thus, the crater on the left is younger. Furthermore, the wall of the large crater is complete, whereas the west wall of the smaller crater is absent, obviously having been destroyed by the larger crater. Even if the two craters did not overlap, the sharp rim, terraced walls, and prominent central peak of the larger crater clearly identify it as the younger of the two. The frames used in the stereogram (p148a) were selected to show exaggerated relief, a technique very helpful to photointerpreters in determining shapes and relative elevations of surface features. The two craters are located in the rugged terrain of the far-side highlands approximately 250 km north of the prominent crater Tsiolkovsky. The photograph below (hrp148b) is an oblique view of the same pair of craters. It is included, not because it is a more dramatic view, but because it shows from another perspective that one crater clearly is superposed on the other. -M.C.M.