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Waldron mystery fossil


aek

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I picked up this weird fossil at the quarry in St Paul, IN last year, found as is: on the ground, split in half. It seems to be studded with crinoid holdfasts and bryozoan encrustations. Any ideas what it is? Under magnification it is a beautiful specimen. Also, I'm tempted to sand/polish one of the halves to possibly bring out some details. Would this be advisable? Thanks for any help.

 

 

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Possibly a colonial rugose coral. 

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end of a bryozoan stem possibly. Cool specimen

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Yes, I think colonial rugose coral as well, something like Pachyphyllum sp,? 

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53 minutes ago, Tidgy's Dad said:

Yes, I think colonial rugose coral as well, something like Pachyphyllum sp,? 

 

 

Pachyphyllum is Devonian.  The Silurian rugosan Diplophyllum caespitosum looks like a better match.

 

Oliver Jr., W.A. (1963)

Redescription of three species of corals from the Lockport Dolomite in New York.

United States Geological Survey Professional Paper, 414G:1–9   PDF LINK

 

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On ‎2‎/‎22‎/‎2018 at 9:40 PM, DevonianDigger said:

+1 to rugose coral. We see it all the time at Penn Dixie with similar cross sections, usually in calcite as would appear to be the case with yours as well. Nice pyrite in there as well!

 

Agreed.

Nice pics helped.... What a beautiful specimen.

The stone may not take to polishing very well, but the inclusions would, definitely.

It is appealing just as it is, just clean it up and keep au natural.

 

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