Map Of gypsum deposits in northern Ohio, black squares show The situation of deposits, from "Geography of Ohio", 1923 Gypsum is Utilized in a wide variety of programs: Deposition: Gypsum to begin with varieties as dissolved calcium and sulfate ions in h2o. These ions can originate from several different resources, https://www.propanraya.com/id/produk/eco-gypsum-ee-4050