Hey @gillian-catlett ! This appears to be a crinoid stem segment or at least its external mold. Casey County has a number of formations which are of Mississippian age, so finding crinoids is not surprising.

Hey @angie-kenny ! This appear to be a piece of quartzite, so not a fossil unfortunately.

Thank you @samantha-ocon !!!

Hi @james-race! Looks like you’re probably collecting in strata from the Woodbine Group, which is of Cenomananian Age of the Late Cretaceous Period. It’s difficult to tell from the photo, but your specimen could be a rib segment or limb bone. It’s possibly from an archosaur or dinosaur, but it’s difficult to determine. Could upload a few more…[Read more]

Glad to be of service @rebecca-oloughlin!!!

@rebecca-oloughlin Siphonophyllia is a rugose or horn coral. A very large one at that. So, yes you are right in assuming a relationship.

Looks like you might have a Siphonophyllia specimen here. https://www.researchgate.net/figure/Figura-2-Siphonophyllia-1-4-Siphonophyllia-siblyi-SEMENOFF-TIAN-CHANSKY-1974-1_fig1_39402817

*anthozoan

Hey @rebecca-oloughlin ! Looks live you have another Carboniferous anthozan there. Probably a genus of coral of some variety.

Greetings @samantha-ocon and @mackenzie-ross-2!!! I was wondering if it was possible to update the geological context information for this specimen. As a research grade specimen, I can’t update it at the moment. Inputting Telychian into the geochronology wizard and adding Red Mountain Formation and Ruffner Member should update the specimen info.

Most welcome @rebecca-oloughlin! I’ve collected quite a few rugose corals over that last year, so your specimens looked quite familiar. Also, thank you for the taxonomy data @mackenzie-ross-2!!!!

So, they are likely Mississippian horn corals. You can see the calices and septal grooves on several of your specimens.

Looks like you might have collected these from the Pahasapa Limestone Formation, which is Mississippian in age.

Hey @rebecca-oloughlin ! These appear to be horn corals.

It could also be a concretion.

Hey @charlotte-pierce ! I believe this is a piece of chert actually.