Furnesfiorden Member
(Furnesfjordleddet)
(Opalinski & Harland 1981)
Main Lithologies. Bioclastic limestone, calcareous sandstone and mudstone.
Basal Stratotype. Mjøsa (Nes-Hamar): Snippsand (Opalinski & Harland 1981, Fig. 6) (PN 074 430).
Definition. The Furnesfjorden Member is characterized by bioclastic limestones, calcareous sandstones and mudstones. The calcareous alga Solenopora is common and locally forms bioherms. Peloidal limestones are developed in the upper part of the member at many localities in Toten. The Furnesfjorden Member is the basal member of the formation throughout the Toten and Nes-Hamar district and is 23.3m (Bergevika) to 30.7m (Snippsand) thick.
Fauna and Flora. In addition to Solenopora the Furnesfjorden Member contains a diverse fauna of brachiopods, trilobites, ostracods, gastropods, bivalves and, in the Solenopora bioherms, corals (Opalinski & Harland 1981 pp.63-65).
(From Owen et al., 1990: The Ordovician Successions of the Oslo Region, Norway. NGU Special Publication 4. Figs. refer to the printed version.