temperature around 100°C, to liberate this water and convert the gypsum into bassanite or anhydrite. Such temperatures can be … reached by solar power, or alternatively, the heat from flaring oil wells can be used. Anhydrite has a considerably smaller … volume than gypsum, so the conversion of shallow underground layers of gypsum into anhydrite creates a subsidence, which can …

temperature around 100°C, to liberate this water and convert the gypsum into bassanite or anhydrite. Such temperatures can be … reached by solar power, or alternatively, the heat from flaring oil wells can be used. Anhydrite has a considerably smaller … volume than gypsum, so the conversion of shallow underground layers of gypsum into anhydrite creates a subsidence, which can …