Limestone

Limestone falls into the sedimentary rock category, made up of mainly calcite and aragonite. Limestone is made up of remnants of marine life, such as coral fragments. The environment that creates limestone is shallow, cool water and it is created from shell and fecal debris, among other marine organisms. Limestone makes up about 10% of all sedimentary formations. Limestone is also formed by evaporation in caves. Stalactites hang from caves and are created from water and matter seeping through caves and creating these slowly-created limestone formations. Several forms of limestone include chalk, tufa, and coquina.

Limestone cliffs in Normandy, France

Limestone statue made in ancient Cyprus