Map Of gypsum deposits in northern Ohio, black squares reveal the location of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in lots of apps: Gypsum takes place in considerable beds connected to other evaporite minerals (e.g., anhydrite and halite), specially in Permian and Triassic sedimentary formations; it is https://www.propanraya.com/id/produk/eco-gypsum-ee-4050