How is Rock Art aged?

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bladup B
bladup Dec 19, 2012 18:51:02
Replying to Sanctuary

only Soft sandstone in 10 mins, that's about it, other stone would take a good bit longer than that.

T tiompan
tiompan Dec 19, 2012 18:52:21
Replying to bladup

bladup wrote:
only Soft sandstone in 10 mins, that's about it, other stone would take a good bit longer than that.
10 minutes on schist which is quite a bit harder than sandstone .