Facies and sedimentological features. (a) Gypsum layers (arrows) in the basal Erguita section. (b) Massive P-rich carbonated sandstones. Note that these rocks are sometimes crumbly. (c) Hummocky cross-stratification. (d) Finning-upward gravity-flow deposit. (e) Nautiloid. (f) Turritella and Oenopota gastropods. (g) Massive shell bed composed of oyster fragments. (h) Alternating carbonates and clayey calcarenites in the uppermost part of the section. (i) Example of oriented cylindrical cores consisting of P-rich calcarenite. Arrows show mm-sized, unsorted phosphatic grains. Scale bar: 5 cm. Sample number is indicated in the white rectangle. Coin diameters: 2.4 cm in (d, f) and 2.7 cm in (e). Hammer and pen lengths: 33 and 15 cm, respectively.