- Nov 2014
Let's not get carried away. Just because a monlith has been found from a certain date does not indicate the same date applies to every remaining monolith elsewhere.
If I had to guess I'd say that if we found the earliest megalithic site that has a very remote and confirmed date in some way, then this would just be one point along a timeline of megalithic building that probably spanned at least a few thousand years.
At Stonehenge and other megalithic sites in Britain, the age and origin of the stones has been thoruughly investigated