posted on Sep, 18 2012 @ 10:32 PM
Seriously though, take a look at how the small stones (pebbles, gravel) are grouped together below the out cropping.
I've seen this before here on earth.......clay/mud with lots of rocks embedded in it, and as they dry they fall to the ground (or as the clay/dirt
I keep thinking there is a name for that, but can't remember. But it does have something to do with water (after it's evaporated away).
Going to bug me now trying to remember what's that called until I go to bed!