This fossil is Hoplocrioceras phillipi (Bean) found in Columbia. This ammonoid dates to Lower Cretaceous Period. It is on display at In...

This crinoid calyx fossil is called Macrocrinus mundulus (Hall). It dates to the Mississippian Period and was found Keokuk of Warsaw, Ill...

This fossil is part of the Indiana University Department of Geology collection. It appears to be a Paraconularia missouriensis (Swallow)...