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Posted in response to Geode in sandstone? from Tanner on February 14, 2011 at 13:48:26:

Re: Geode in sandstone?

Most likely what you've found is a concretion. They often have a round, bulbous shape. Not always, but sometimes they form around a fossil. I've found a few out near Point Reyes, California, that had a very small black fishbone at the center.

From Dave - February 14, 2011 at 22:38:19

Message: 69674



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