Fig. A.6
Basaltic dust coatings of variable thickness on solid basalt (A) and andesite(B) substrates (from Graff 2003). Characteristics of spectra with thin coatings of 5–13 μm are more similar to those observed in Bennu T2 spectra. Coatings ≥47 μm result in transparency features that are stronger than the features observed in the Bennu spectra.
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