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A long shot, but worth asking about.

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Good evening folks! I’ve had this specimen in my collection since April 2013 when I first visited Big Brook in New Jersey.
I have a separate fossil from the same trip that I am more thoroughly convinced is bone which is highly dense and has probable scavenging marks.




If it is a fossil then a more reasonable answer may be burrow cast. 
I may have slight delusions of grandeur with this piece, but I think it’s worth discussing! 


Edited by PaleoNoel
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  • 1 month later...

I could be wrong but in my opinion it just looks like an ironstone concretion. These have fooled me more than once.

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I also agree- ironstone concretion.

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