Fig. 5 in Exceptional cameral deposits in a sublethally injured Carboniferous orthoconic nautiloid from the Buckhorn Asphalt Lagerstätte in Oklahoma, USA

Fig. 5. Thin sections of the orthoconic nautiloid specimen BSPG 2011 0002 from the Carboniferous Buckhorn Asphalt Quarry, Oklahoma, USA illustrating the whitish cameral deposits (layers 3 and 4) in adoral and adapical chambers. A. Adapical septum, altered early deposits and black deposit overlain by the cauliflower−shaped and laminated whitish cameral deposits in the older chamber. B. Ventral side of the conch with the middle septum, early cameral deposits, the black deposit and the whitish deposits. C. Middle septum with ventral side of the siphuncle of the adapical and adoral chambers; hypo− and episeptal deposits and the black deposit; in the siphuncle sediment and siphuncular deposits are present; in the adapical chamber the filling with hydrocarbons is obvious. D. Ventral side of the adapical chamber with cameral deposits and hydrocarbon filling. E. Whitish cameral deposits and black deposit in the adapical chamber. F. Whitish cameral deposit illustrating the alternation of lighter and darker layers and the grading into darker later deposits of layer 4.