QUOTE (dcman @ Aug 2 2007, 12:44 AM)


still trying to determine if this is natural or not.
From my scanty knowledge of lunar geography, I expect this ledge is a lava outflow. Notice all the rilles in the area, which are indicative of collapsed lava tubes. The meteor which smashed into the surface here must have exposed a hot magma tube close by, popping it like a zit. The stuff flowed out and into the crater right by it, forming a lava slope. Because lunar surface gravity is lower, it would have less of a tendency to spread. Also, the high-contrast film makes it look slopier than it really is. Something you wouldn't really see on Earth. The rock in the lava slope would be your garden variety basalt like you find on volcanic slopes on Earth.
Note the two-pronged nature of the flow, as if there's a depression. From my guess, an exposed region of lava flowed out and around a jutting surface feature and rejoined deeper in the crater.