Skeletal–cement–microbial reef (SCMR-1) in lower part of section
Grey thick-bedded microbial carbonate and phylloid algae boundstone. The substrate is composed of grey thick-bedded wackestone and packstone. Peloids, microbial mat debris, bioclasts constitute most of the volume of the lower part. Bioclasts, including bryozoans, small brachiopod shells, gastropods, ostracods, crinoids, and foraminifera. The substrate becomes clotted wackestone towards
the mound and the biodiversity decreases. Skeletal grains have micritic envelopes.