// Yes, Mosaic and just a few feet under the soil!
What I find intriguing is, why was they toppled and by whom ?//
and I think Mosaic - if she has recovered from the battering in the immigrant/refugee thread - is the person to ask as she lectures in arch and anth
but neva mind you have my opinion first
if one culture ( stone/bronze springs to mind ) displaces another on sign is that the later circle is off-centre or intersects
like this scroll down to easter aquahorthies piccy
http://www.dayofarchaeology.com/tag/recumbent-stone-circle/
whereas at Durrington walls the stone have been laid and then earth tipped over them to form a wall - this give continuity not disconnection ( or conquest )
which means that the two cultures were related to each other and the later one succeeded and built on the earlier
I can tell you this will keep the archeologists yakking for years.....