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Michelle Sawicki Library

What might this be?

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Michelle Sawicki Library

I picked this up today and am wondering if it is a fossil or just an odd shaped rock?

 

20170419_205427~2.jpg

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Michelle Sawicki Library

The other side:

 

 

20170419_205411~2.jpg

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ynot

This looks geologic to Me.

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Fossildude19

+1 for geologic. Not seeing any fossil here. 

Regards,

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Bozark

I've found a few pieces of concretion like this in Cretaceous marine sediments, it will usually be gypsum and sulfur deposits between cracks.

 

There is another possibility though. Quite often there are worm burrows around belemnite or baculite shells. Given how worn they are, it could be it's one of those shell fossils with a few burrows just heavily eroded. Do you have the age and location?

 

 

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abyssunder

Mineral veins, but from what, only Mo. Nature might tell.

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