Gypsum Can be found in hydrothermal veins, that happen to be fractures in rocks crammed with mineral-wealthy fluids that originate from deep in the Earth's crust. Map of gypsum deposits in northern Ohio, black squares indicate The placement of deposits, from "Geography of Ohio", 1923 Gypsum is Employed in a https://www.propanraya.com/id/produk/eco-gypsum-ee-4050