After a description of the various types of limestone around the world, the author lays out four problems with the standard theory of how limestone formed in warm, shallow seas. The rest of the book describes an alternative theory for the formation of limestone, suggesting that most limestone came from inorganic sources, possibly from mineral-saturated water that had been under the crust of the earth since its creation. In a global flooding event, this mineral water came to the surface, was sorted into layers by liquefaction, and formed a large portion of the world's sedimentary rock layers.