This fossil appears to be a  Bickmorites bickmoreanum nautiloid. It was found in the Silurian aged Louisville Limestone layer of Jeffers...

These images are of the surface details of an  Arachnophyllum mammillaire  (Owen) colonial coral fossil. It was found in the Louisville L...

This fossil appears to be an  Eridophyllum archiaci coral. It was found in Clark County, Indiana USA (Beechwood Formation). It dates to ...