WTF, A buddy sent me the links saying these pics were leaked from Nasa from the Mars surveyor and never meant to be published.
Thats some perfect rock erosion if you ask me!
Expanded view
image source: http://farm4.static.flickr.com/3296/...8836e102_o.jpg
Closeup view:
image source: http://farm4.static.flickr.com/3264/...17081a8d_o.jpg