This image seems to contain some strange formations that appear to be manufactured items, it was brought to my attention by a Facebook post but they did not work it the way we do, so this is my take.
This is the left cam image on the MSL site, notice how dark it is
And in this one I am highlighting all the areas of interest. The 'winged' rock seems to have regular-spaced nodules on it and be textured like wood, but it may be image artifacts although it seems to be there on all images.
-- Edited by Chandre on Thursday 5th of September 2013 04:47:54 PM