Was this "Blob" formation turned over rather than run over? If so, that would put the rectangular rock which appears to be getting eaten on top of the sulfate (or whatever) deposit. Are there any pictures of the sample before being disturbed?

Note the charming little spheroids decorating part of the deposit. Are they equivalent to the hematite covering Meridiani? Did the deposit form in place? If so, when? Was the angular rock that looks like it is being consumed already there, or did it arrive later?

And what of the prismatic rock in front of the "Blob" formation? It looks to have been dislodged and turned over -- knocked about pretty good, actually -- and its interior whiteness suggests more sulfate deposit.

As for the worms and frogs and stuff...;-)

Cheers,