Beskrivelse av faunaen.

Abstract

The fauna here reported from Karmøy is from a light often micaceous calcareous sandstone, the fossils occurring as rusty impressions and casts, mostly deformed and indistinct. Corals and crinoid stems occur in greatest number. The bad state of preservation will hardly allow of a more precise determination, but the corals are of the common Upper Ordovician to Silurian types: Halysites, probably Favosites and cup corals, indicating the age as Upper Ordovician or younger. A cast of a brachiopod with deeply impressed sinus has kindly been examined by Dr. J.K.St. Joseph, who regards it a Triplecia. A gastropod has been determined with some confidence as Ectomaria sp., a genus occurring in the topmost Ordovician and lowermost Silurian Estonian. Finally a mussel, described by De. O. Isberg in the sequel as Byssonychia? sp. ought to indicate an Upper Ordovician age. The fossiles so far determined restrict the age limits between the Upper Ordovician and basal Silurian (Lower Llandovery). Most probably the deposits carrying our fauna is of Upper Ordovician age (=5a of the Oslo area) and thus equivalent to the richly coralliferous shale and limestone in the island of Stord north of Karmøy, which has a quite corresponding position in relation to the polygenous conglomerate as the Karmøy deposit.