Eocene Sea Urchin Fossils | Echinoids (Sea Biscuits)

This is a small collection of three sea urchin fossils (echinoids). The details on these are incredible. One was even ever so slightly compressed by the sediment it was fossilized in which cracked it, but it still managed to fossilize and stay together. It is completely stable now, showing an interesting preservation characteristic. These are from the Eocene Ocala Limestone formation.