Map Of gypsum deposits in northern Ohio, black squares point out The placement of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in a wide variety of applications: Gypsum are available in hydrothermal veins, which can be fractures in rocks filled with mineral-abundant fluids that originate from deep throughout https://www.propanraya.com/id/produk/eco-gypsum-ee-4050