White Rock Salt Rock salt can be found all over the world. At various times in the geologic past, very large bodies of water (such as the Mediterranean Sea and a huge body of water that sat where the Atlantic Ocean sits now) evaporated and made enormous deposits of rock salt. These deposits were later buried by marine sediments, but since halite is less dense than the materials that make up the overlying sediments, the salt beds often punched up through the sediments to create dome-like structures. These are now mostly buried by additional sediments.
