Fig. 11. Scleractinian Pachysolenia cylindrica Cuif, 1975 in Nanostructure of biogenic versus abiogenic calcium carbonate crystals

Fig. 11. Scleractinian Pachysolenia cylindrica Cuif, 1975, lower Norian (Upper Triassic), Alakir Çay, Turkey; ZPAL V.31/7. Polished and etched (formic acid, 1%, 20s) pachythecal wall consisted of aragonite fibers; two enlargements (A, B). AFM (contact mode; buffered pH = 8, ammonium persulfate 1%, 10 min.): height−2D projection (C, E), and deflection (D, F) images of 2×2 µm (C, D) and 500×500 nm (E, F) skeletal surface. Skeletal regions that show effects of oxidizing solution action (upper part of images) do not exhibit distinct nanogranular pattern. Grayscale bars (left) show z−scale (height) of 2D projection images.