Map Of gypsum deposits in northern Ohio, black squares show The situation of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in a wide variety of applications: Gypsum is calcium sulfate, a Obviously taking place mineral. It's been touted as helpful for breaking apart compact soil, Particularly clay soil. https://www.propanraya.com/id/produk/eco-gypsum-ee-4050