Crawfordsville Indiana crinoids on display at the Indiana State Museum called
Sarocrinus varsouvensis,
Onychocrinus ulrichi, and
Camptocrinus crawfordsvillensis. The inside of the shell of a brachiopod called
Echinoconchus alternatus is also displayed. These fossils are found in the Edwardsville Formation and existed in the Mississippian Period (approximately 359 to 318 million years ago).
