Cool!
Looks like a giant eggshell broken apart, covered with motled sticky lumps of turd.
Hah! You don't have "turd" in your geophysics dictionary, do you, Doctor Hoffman? [wink]
;-)
But, to get serious, what about that white [whitish?] rock on the other images?
If that's a basaltic rock, it sure is an odd one.
I love those hexagonal patterns on it; you can just make them out..