Gypsum, bassanite, and anhydrite at Gale crater, Mars ...
The slower desiccation rates in "real rocks" that are shown in Figure 6 are exploratory, and more work on rates of gypsum to bassanite transition may help to constrain the settings in which gypsum may persist near the martian equator. With such knowledge it may be possible to apply Casulfates as indicators of both primary aqueous processes ...