General Science Salar de Pajonales Context: Researchers are studying gypsum deposits in the mineral Salar de Pajonales, found on Earth and Mars. About gypsum Gypsum is a sedimentary rock composed mainly of calcium sulfate dihydrate (CaSO₄·2H₂O) and anhydrite (CaSO₄). It usually forms in large basins with evaporate minerals such as anhydrite and halite. In India, marine gypsum is extracted from salt pans during salt production, mainly in Gujarat and Tamil Nadu.
