A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals.
Sedimentary rock composed chiefly of calcium carbonate CaCO3, either derived from the shells of marine organisms or precipitated from solution, mostly in the ocean. Various types of limestone are used as building stone.
Marble is metamorphosed limestone. Certain so-called marbles are not in fact marbles but fine-grained fossiliferous limestones that take an attractive polish. Caves commonly occur in limestone. Karst is a type of limestone landscape.
Sedimentna stena, vapnenac.