Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). It makes up about 10% of the total volume of all sedimentary rocks. Most cave systems are through limestone bedrock.


A building material, aggregate for the base of roads, white pigment or filler in products such as toothpaste, paints, & chemical feedstock for production of lime.