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Posted in response to Gneiss from Frederic on August 31, 2008 at 10:53:00:
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I don't believe your rock is gneiss. I think those are layered sediments. It has been tumbled in a river or on a beach, so it is obviously relatively hard. I think the layers are probably sandstones and shales.
From Don Peck - September 02, 2008 at 08:04:01
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