St. Paul find

[Eastonian]

I found this specimen last summer in the St. Paul Stone Quarry in St. Paul, Indiana. I think this site is Silurian. The oval on the left is 1.5 x 8 cm. The one on the top is 4 x 10 cm. Lots of smaller ones. They're flat, not raised. Any idea what they are?

[fossilcrazy]

Hi Eastonian, It looks like your piece isn't Waldron Shale. The colorations could be mineral migrations or early concretion chemistry. They could be caused by fossil material used as a nucleus, or just mineral chemistry that just started at high concentrations. I enjoyed that quarry, but rules and safety regulations severely limited fossil exploration. Thanks for posting. 

[Ken K]

Eastonian,  I have seen these frequently in the Waldron.  They are a bit of an enigma...have not received a solid determination as to what they represent despite referring them to a Paleontologist at the University of Wisconsin some years ago.  Have not followed up lately so if you figure them out let me know as well!...Lol...Ken