Coral reef boundstones, together with coral rudstones and floatstones. Massive and branching corals acted as the main component of vertical reef growth and provided the skeletons on which  abundant  microorganisms  and  microbialites  were    encrusted. The encrusting microorganisms (mainly   microproblematica) are identified as Bacinella-Lithocodium, Iberopora, Koskinobullina, Prismenproblematikum, Tubiphytesand serpulids, and  are heterogeneously distributed. Microbialites    are commonly encrusted. bioclastic  grainstones  have  been  observed in the reef matrix. Growth cavities are commonly developed and filled with early marine isopachous fibrous cement and occluded by blocky calcite cement. Tubiphytes and microbial fabrics overgrown corals.