This fossil appears to be a  Rhodocrinus nodulus  (Hall) crinoid calyx fossil. It was found in the Jeffersonville Limestone of Jefferson ...

These images are of  Polyaxons strongylasters  sponge spicule fossils. They were found trapped in cavities in Halysites coral fossils and...

This image is of a Campanile anachoreta gastropod fossil. This animal existed in the Cretaceous Period. Fossil was discovered in Thebai...