Map Of gypsum deposits in northern Ohio, black squares reveal The situation of deposits, from "Geography of Ohio", 1923 Gypsum is Utilized in a wide variety of programs: Salt Flats: Gypsum is a common ingredient of salt flats, which happen to be expansive, flat places which has a salt crust https://www.propanraya.com/id/produk/eco-gypsum-ee-4050