This Eucalyptocrinus crassus crinoid calyx bears the remnants of a Crania sp. brachiopod.  These brachopods existed in the Middle Silur...

The illustration shown was drawn by J.C. McConnell and can be found on Plate 37 of the Indiana Department of Geology and Natural Histor...

This ammonite fossil is quite ornate with fractal like patterns representing sutures. The ammonite is known as the Placenticeras meeki f...