Click on the photos above for full size and detail shots.
This is the inner face of stone10, the
stone partially obscuring it in the photos above is the first stone of the
rectangular "Cave" structure that stands inside the circle. The
obscuring stone is also said to bear rock art.
The pattern claimed for the "carving" on stone 10 would make it the most complex
at the site, but as the
natural light photo shows, there are many similar grooves on this face.