These deposits are the resources for the production of dry salt and salt in brine. Salt is produced to meet established standards, verified by standard tests .
Salt is categorized as four types, based on the method of production.
The following methods are used to produce dry salt. Underground halite deposits, are conventionally mined by drilling and blasting to produce rock salt. Shafts of about 20 ft in diameter are sunk into the salt deposit, which may be at depths of 500 to more than 2,000 feet below the earth's surface. The thickness of bedded salt deposits vary but typically is between 15 and 45 ft. Geologists are uncertain of the thickness of salt domes or diapirs, because no one has drilled to the bottom of one yet.