Eroded Crinoid Stem

An eroded crinoid stem from Lake Cumberland, Kentucky. The image contains a variety of different views. This crinoid was from the Mississippian Period.

Devonian Trilobite and Cephalopod

Here is a cephalopod segment piece and trilobite head from the Devonian Period found in Clark County, Indiana.

Cross section of Ordovician Cephalopod

Here is a small cephalopod mold about 2 cm across. A siphuncle can be seen in the center of this mold filled with calcite or quartz. This cephalopod was found in eastern Jefferson County, Kentucky. It is from the Ordovician Period.