Shark Fishing in Big Creek Reservation ID: 7420 | This file appears in: Dunkleosteus During the Upper Devonian epoch, the shallow inland waters covering much of northeast Ohio attracted an array of sharks and armored fish. Cleveland shale, formed from mud that once covered the sea floor, offers paleontologists a richly-detailed chronology of Devonian sea life. The large concretion displayed in the photo contained a five-foot primitive shark. . | Source: The Jesse Earl Hyde Collection, Case Western Reserve University (CWRU) Department of Geological Sciences Download Original File SourceThe Jesse Earl Hyde Collection, Case Western Reserve University (CWRU) Department of Geological Sciences "Shark Fishing in Big Creek Reservation" appears in: Dunkleosteus