To satisfy microbial nutritional fitness, the research team uses mineral mixtures that mimic the Martian regolith composition from
different locations and historical periods of Mars: «JSC 1A» is mainly composed of palagonite — a rock that was created by lava; «P - MRS» is rich in hydrated phyllosilicates; the sulfate containing «S - MRS,» emerging from acidic times on Mars and the highly porous «MRS07 / 52» that consists of silicate and
iron compounds and simulates sediments of the Martian surface.