Distribution and characteristics of Adirondack-class basalt as observed by Mini-TES in Gusev crater, Mars and its possible volcanic source

► More than 100 rocks observed by Mini-TES belong to the Adirondack class. ► Adirondack class rocks are observed both west and east of the Columbia Hills. ► These rocks exhibit only minor mineralogical variation. ► We propose that thin dust coatings on these rocks affect their TIR spectra. ► Thin dust coatings result in some non-linearity of spectral mixing.