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By comparing the five meteorites, they showed the presence of veins created during an impact on Mars. They suggest that this impact was associated with a 1-10 km diameter crater. Buried ice melted during this impact depositing clay, serpentine, carbonate and a gel deposit in the veins. This work closely ties in to recent geological discoveries of clay and carbonate on the surface of Mars made by NASA and ESA probes, and shows how some of it probably formed. Serpentine mineralisation is associated with the production of methane. It is the purpose of the 2016 Trace Gas Orbiter mission to search for and understand the origin of any methane in the Mars atmosphere as it can be a biomarker. This work shows one of the ways that methane was probably produced.