How is Rock Art aged?

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thesweetcheat T
thesweetcheat Dec 18, 2012 19:45:07
Replying to tiompan

Sorry, ideal for weathering or for RA (or both)?

T tiompan
tiompan Dec 18, 2012 19:49:29
Replying to thesweetcheat

thesweetcheat wrote:
Sorry, ideal for weathering or for RA (or both)?
Engraving .