Thanks tjj, I dont know if Big Bruce, the originator of this thread is Canadian, maybe he could shed some light on your questions. I havent got a clue!! Fascinating stuff though. Ive got a book,( which I havent got round to reading yet) about North American monuments, some look fabulous too, not too disimilar to our long barrows, chambered cairns etc. There are quite a few 'balancing' Logan stones around too. Certainly opened up my eyes (and mind!!) to an ancient culture i had no idea existed!