The coral display includes corals from the Ordovician Age through the Pennsylvanian. These corals were of two types. One kind was a solitary or horn-shaped coral. The other was a tabulate coral that formed mounds or even reefs. One of the mound forming tabulates was called Syringopora, which covers this slab of Pennsylvanian Beil Limestone from eastern Kansas. The bottom image is a closeup of the slab showing the skeletal tubes of the coral.