Limestone can be found effectively on the continental crust. Most importantly, Limestone is not found everywhere, it’s very rare. The limestone could be shown at the surface due to the erosion or could be buried hundreds of feet underground covered by sedimentary rocks. Most Limestones can be formed in calm shallow, warmness of marine water. Most Limestone can be formed by straight precipitation of calcium carbonate fresh water. That kind of environment is where the organism is capable of form calcium carbon skeleton and shell can effortlessly pull out the needed material from the ocean water. Limestone can also form through evaporation. Some limestone be formed in the marine environment where a huge deposit of living thing and carbonate precipitation construct over time.