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A rock. Geological or paleontological?


Mignoffo

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A friend found this interesting rock in Johnson County, Iowa. Does anybody have an opinion on how it came to be? 

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I can see why you're asking, it gives the initial impression that it's a fossil, but I agree that it's just an interesting concretion (aka a rock)

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Cool info thanx! It was from a thread on another forum, so I will pass the info along. 

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