Sodium chloride exists in the ocean water in enormous amounts, occurring equally in great halite deposits, formed by the evaporation of prehistoric seas, or still in dry salted lake-beds. The main deposits can be found in the USA, United Kingdom, France, Germany, China and India. In a lot of regions, like Portugal, the evaporation of the sea water is the used extraction process. The sodium also occurs in several ores, like borax, the cryollite and the Chile nitrate.