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Weird rock or weird Fossil?


Muffinsaurus

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Found in a creek in Floyd County Kentucky. Area is Pennsylvanian (according to the university of Kentucky website the area may also have a very small mix of Cretaceous, Tertiary and Quaternary).

 

I'm wondering if this is a fossil, like an impression of a seed or something, or if this is just a weird rock.

 

Thanks in advance.

 

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This reminds me of the concretions in my area, that can sometimes have a soft, clay-like center that can wash away.

I think the lines may be an imprint of something (shell, maybe?)  on the concretion itself.

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1 hour ago, Fossildude19 said:

This reminds me of the concretions in my area, that can sometimes have a soft, clay-like center that can wash away.

I think the lines may be an imprint of something (shell, maybe?)  on the concretion itself.

 

Thanks! Those little lines had me questioning if it could have been a very badly warn shell of some sort. However I never thought about a concretion with a soft center. In fact I have been finding loads of hollow rocks after all the flooding. So with this info I wonder if these concretions have been washed out of the hills, cracked open and cleaned out by the flooding:zzzzscratchchin:

 

Thanks again!

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