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originally posted by: Rosinitiate
a reply to: Byrd
I can't copy and paste but for summary:
3 independent chronometric techniques. AMS 14C dating of weathering rind. In order to constrain the age they use a mutli-tiered approach using 3 independent but "experimental" techniques.
Source - www.scahome.org...
originally posted by: Shadoefax
I've always wondered how archeologists/anthropologists determine whether a petroglyph is just graffiti or something more important. For all I know, the petroglyph shown in the OP means "Lonakana + Wehilani 4-evar!".
Now that along with some investigation around the place to see when the sea was at a "level" that could allow those inscriptions to be made and some stratification you can get a "at least" time period.