Common Name: Crinoid Scientific Name: Platycrinites symmetricus, Dichocrinus ovatus, Rhodocrinus sp., Cactocrinus sp. Photographer: Calvin J. Hamilton Copyright: © 2004 Calvin J. Hamilton Date: 2004/12/30 Location: Iowa

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Caption

These Fossils date to the Early Carboniferous period, 345-325 million years ago.