A Beresella-dominated algal mound. Komia bafflestone of the foremound facies further increased the relief of the crinoid bank on the seafloor. The lower part of the mound framework is dominated by Shamovella–Archaeolithoporella boundstone, while the main (upper) mound framework consists predominantly of Beresella boundstone. Grainstone–packstone characterizes the windward mound flank facies. The mound capping facies include a lower skeletal packstone–wackestone and an upper lagoon facies marlstone and black shale. Various algal colonies performed different roles in the formation of the mound. Komia colonies were the mound constructors that baffled higher energy currents and entrapped fine sediment. Archaeolithoporella, Shamovella and possibly microbes (cyanobacteria) acted as the binders to stabilize mud and fine-grained sediment. Beresella colonies were the major framework constructors whose network entrapped the mud to build the mound.