QUOTE(eveningsky339 @ Aug 27 2005, 07:14 PM)
Native Americans maybe?
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Could very well be. On my dad's old farm in Va there was a standing stone. It was small, about 3ft tall. Apparently it was put there by Native American's - so the story went.
Still, even if it (or these things in OK) were done by Native Americans of the region - it doesn't make them any less important or less interesting.