e/Carbonates on Mars

Information
has gloss	eng: Evidence for carbonates on Mars has remained elusive. For example, most remote sensing instruments such as OMEGA and THEMIS that are sensitive to infrared emissivity spectral features of carbonates, have not suggested the presence of carbonate outcrops at 100 m or coarser spatial scales. Though ubiquitous, carbonates dominated by Magnesite (MgCO3) in Martian dust have mass fractions less than 5% and can form under current atmospheric conditions. . Furthermore, with the exception of the surface dust component, carbonates have not been detected by any in situ mission, even though mineralogic modeling does not preclude small amounts of calcium carbonate in Independence class rocks of Husband Hill in Gusev crater (note: An IAU naming convention within Gusev is not yet established).
lexicalization	eng: Carbonates on mars
instance of	c/Rocks on Mars