How is Rock Art aged?

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tiompan T
tiompan Dec 19, 2012 16:30:54
Replying to Emma A

Emma A wrote:
And why are they (cup marks) so prolific? Are they easy to make? I would have thought that carving a straight line would be easier than a circle, but you don't get squares do you?
easy to make cup marks Emma , you do get rectangles/squares but not too common .

E Emma A
Emma A Dec 19, 2012 17:42:09
Replying to tiompan

OK so how do you do it? I imagine using a spherical stone (quartz?) cupped in the hand and grinding it against the "canvas", twisting the wrist. To make a straight line, you'd use a sawing action which seems much easier and less strenuous to me!