Skulls all over Mars! Check out this Mars Graveyard!

Mars has a graveyard of skulls on its surface. In the begining of the video I focus on the main skull that caught my attention but towards the end you can see a multitde of skulls and faces.  Could this be a Martian statue graveyard or fossils? You can find this amazing photo here http://mars.jpl.nasa.gov/msl-raw-images/msss/00952/mcam/0952ML0041960200403477E01_DXXX.jpg