The photomicrographs showing in bioclastic limestones in Fig. 1: Gastropod (G) and pelecypod (P) clasts (PPL, stained), Sample No. CHN 23, Fig. 2: Brachiopod (B) shells (PPL, stained), Sample No. CHN 25, and in Fig. 3: Bryozoan (Bz) shells (PPL, unstained) Sample No. CHN 31, and in Fig. 4: Gastropod (G) shell (PPL, stained), Sample No. CHN 35.