Michellets said:
Looks like stone in the lower one, possibly igneous in composition, slighly vesicular in nature and the grayish color leads me to believe it is composed of granit,
well done, it is granite, the image is created by the shadows from the solstice sun.
I am told its cave art done through the art of ilusion.
the book "creative explosion" has the same style of cave art, it is a horses head that apears from shadows of lanterns placed on ledges. it is in northern france and was found by accident.
the top one is sand stone, a cave painting done by embedding paint in the sandstone.
France can have cave art , why cant we have cave art in America.