The Tangjiahe section contains three levels of reefal buildups that were constructed by aconsortium of archaeocyaths and calcimicrobes in varying proportions. The lowest (oldest) reefal buildup is acalcimicrobial biostrome, possibly in the form of a wide mound with a low relief (unconfirmed due to outcroplimitation), which was formed byEpiphytonwith rare small archaeocyaths, and is sandwiched by flat-pebbleconglomerates. The middle reefal buildup is a high-relief calcimicrobial mound, enclosed by oolites, that was built byintergrownRenalcisandTarthinia.