[bonesmccoy]

Looks to me like your 3-D stereoscopic view has a low sand dune in the foreground with a crater or some sort of depression behind it.

[Paradox]

To me? It looks like that "dune" is actually something sticking up out of the martian sand. Maybe some hardened volcanic flow. Perhaps the whole area, because of the wind, really only has a relatively thin layer of martian sand.