What Is A Rock Made Of Shells And Corals Cemented Together Called?

What Is A Rock Made Of Shells And Corals Cemented Together Called? Coquina (“co-keen-ah”): A sedimentary rock consisting of loosely-consolidated fragments of shells and/or coral. The matrix or “cement” consolidating the fragments is generally calcium carbonate or phosphate. … Coquina forms in near-shore environments, such as marine reefs. What are rocks with shells called? Coquina