gypsum mining process and costs
gypsum Definition, Uses, amp; Facts Britannica . Gypsum occurs in extensive beds associated with other evaporite minerals (, anhydrite and halite), particularly in Permian and Triassic sedimentary formations it is deposited from ocean brine, followed by anhydrite and halite also occurs in considerable quantity in saline lakes and salt pans and is an important constituent of cap rock, an