Mississippian Period Fossils

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).

Starfish and Crinoids from Indiana

Indiana State Museum has a number of beautiful fossils on display from Crawsfordville, Indiana. This pictures has a starfish fossil called Aganaster gregarius.  Crinoids shown are Barycrinus stellatus, Hylodecrinus briareus, and Aganaster gregarius.  They are found in the Edwardsville Formation and are from the Mississippian Period.

Crawfordsville Indiana Crinoid Calyx Fossils

This picture is of crinoids from Crawfordsville, Indiana on display at Indiana State Museum. The four crinoid calyx that have been labeled and they are Aulocrinus bellus, Cyathocrinites multibrachiatus, Scytalocrinus robustus (Hall, 1861) and Agaricocrinus americanus. These crinoids are from the Edwardsville Formation (Valmeyeran series) and are from the Middle Mississippian Period.