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Petrified wood or shale?

I recently visited Arnold CA and I brought home a ton of what I thought was petrified wood. When I carted it all home, my Dad said, "That's not petrified wood, it's shale!" It sooo looks like the tree bark! What do you think?

Thanks,
Tiffany

From Tiffany Chapman - March 31, 2008 at 07:54:41
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Message: 66296

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Bob Keller