It's interesting to note that many of the valley structures (such as Vallis Rheita and Vallis Snellius) as well as many of the crater chains seem to focus on the Fracastorius area of Mare Nectaris. At a guess, one or the other (most likely the Nectaris impact, which seems to have also created the Altai Scarp) practically cracked the face of a quarter of the moon. Amazing.
How'd you like to see one of those impacts now? Woo.
|Chart 57||Moon-Lite Atlas for chart 58||Chart 59|