Map Of gypsum deposits in northern Ohio, black squares point out The situation of deposits, from "Geography of Ohio", 1923 Gypsum is Utilized in lots of programs: Salt Flats: Gypsum is a standard part of salt flats, which are expansive, flat places using a salt crust around the surface area. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050