Wenlock Group
Common fossils are Phacops caudatus, Encrinurus tuberculatus, Orthis calligramma, Atrypa reticularis, and Orthoceras annulatum.The fossils are on the whole closely similar to those in the limestones above with the natural difference that corals are comparatively rare in the shales, while graptolites are abundant.[1] The fossils include corals in great variety (Halysites catenularis, Favosites aspera, Heliolites interstinctus), crinoids (Crotalocrinus, Marsupiocrinus, Periechocrinus), often very beautiful specimens, and trilobites (Calymene blumenbachii, the Dudley locust, Phacops caudatus and Illaenus (Bumastus) barriensis).[1] The greater part of the known Silurian fauna of Britain comes from Wenlock rocks; J. Davidson and G. Maw obtained no fewer than 25,000 specimens of brachiopods from seven tons of the shale.In the Dingle Peninsula one finds the Ferriters Cove Beds, a thick series of shales, slates, and sandstones with lavas and tuffs.