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Carbonate
What is the compound in shells of marine animals that make up limestone?
Limestone; Made up of mainly calcite that has been made usually by the shells of some marine animals, limestone is also the stone that holds up the py...
What mineral is formed in the shells and skeletons of ocean organisms?
Many ocean plants and animals build shells and skeletons out of two chemicals that exist in seawater, calcium and carbonate . Organisms combine calciu...