Asterobillingsia Bellerophon bioturbation bivalve bone brachiopod Bryozoan cephalopod Chestnut Run Cladopora colonial Coral Coral crinoid Cylindrophyllum Cystoporid Bryozoan Encrinurus Favosites fenestella Fenestrate Bryozoan fish bone gastropod golf course trail goniatite Grammysoidiea Ichnofossils Lake Erie Orthid orthonic cephalopod Outside packstone Phaceloid Pharkidonotus plant Pleurodictyum Prasopora Productic Protoleptostrophia rhipidomella Rhynchonellid river rock Rugose Coral Shenango Dam Shenango River Lake Shenango River Trail Shenango Valley Spiriferid strophomemid Syringopora Tabulate Coral Tentaculite thamnopora Trepostome Bryozoan Trilobite Walnut Creek Access Area