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limestone caves
Baratang Island, IndiaAbout
A limestone cave is most likely to contain beautiful cave formations. Also, the deepest and longest caves in the world are of this type, making them some of the most adventure. Limestone is mostly made up of the mineral calcite(calcium carbonate). Most limestone was formed on ancient ocean floors, the calcite coming from the shells of marine organisms. Limestone is very soluble, meaning it is easily dissolved. Rain water picks up carbon dioxide in the air and a weak solution of carbonic acid is formed. This water can dissolve limestone over time, creating a cave.
