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The natural way is for a large piece of grit or small stone to get caught in a depression then when wind swirls it around creating a bowl like appearance. Ahh, that makes sense. These remind me of shellfish fossils though! Dunno, need to go back and have another ganders. Reply | with quote |  13th June 2008ce 12:54 In reply to: Re: Cup and ring marks: wot dya think? (Penske666) |
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