Alphamstone forum 2 room
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Is there any way of teling the difference between natural and man-made circles. Is there a size or notable demarkation in the pattern (some kind of tool working!)

I'm guessing patterns are random?

I'm guessing patterns are random?
Yes, the patterns in the stones at Alphamstone are random - some a couple of centimetres deep. I really don't know anything about rock art and can't work out how holes like those would be created naturally; wouldn't they just get blocked up with mud up if they were outside? (the deep holes at Alphamstone are blocked up).