Map Of gypsum deposits in northern Ohio, black squares show The placement of deposits, from "Geography of Ohio", 1923 Gypsum is used in numerous types of purposes: Salt Flats: Gypsum is a common component of salt flats, that happen to be expansive, flat spots with a salt crust over the https://www.propanraya.com/id/produk/eco-gypsum-ee-4050