Some kind of solitary coral, but I’m not as good at narrowing these down. Not necessarily rare here, but not as abundant as the colonial corals. #paleontology #geology #coralfossil #solitarycoral #horncoral #fossils #illinois #illinoisgeology
Pretty example of Favosites, a genus of tabulate “honeycomb” corals, and a fairly common fossil in central IL. #fossils #paleontology #geology #favosites #coralfossil #illinois #colonialcoral