This is formed by a rocklike accumulation of calcareous skeletons
Built 
up layer by layer by living corals growing on top of the skeletons of past... [DOC] [TLE] Investigation of Coral Reefs :: Papers - Free Essays [PAR] It is formed by a rocklike accumulation of calcareous (calcium-containing) 
exoskeletons of coral animals ... by living corals growing on top of the skeletons 
of past generations, ... Other species of algae, both fleshy and calcareous, grow [DOC] [TLE] The Coral Reef Ecosystem - Scio School District [PAR] It is formed by a rocklike accumulation of calcareous (calcium-containing) ...