Map Of gypsum deposits in northern Ohio, black squares show The placement of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in numerous types of programs: Salt Flats: Gypsum is a standard element of salt flats, which can be expansive, flat regions with a salt crust to the floor. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050