For more in depth information about different rocks and minerals, and where they can be found in The usa, click the button underneath. Gypsum occurs in intensive beds associated with other evaporite minerals (e.g., anhydrite and halite), notably in Permian and Triassic sedimentary formations; it's deposited from ocean brine, followed https://www.propanraya.com/id/produk/eco-gypsum-ee-4050