Im curious though if anyone is sure the stone rows at Carnac have been dated to 4700 BC or if that was just a carbon date for the oldest tomb in the Brttany region?
There is no absolute dating i.e. RC or dendrochronoly but the ceramic assembalge at le Manio did give a date circa 4500 BC and iirc some the Kermario stones were above that so they at least can be shown to be younger . Without organic finds or decent stratigraphy it is a matter of association .