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Areas on sample 14 analyzed with VSWIR spectrometer. Visible-color, subframe image of sample 14 acquired by the MMI composed of bands RGB=0.64, 0.52, 0.46 μm, respectively, to simulate natural color, with white circles (A–C) marking areas analyzed by the laboratory spectrometer (spectra are shown in Fig. 15). Image size is 25×25 mm at 62.5 μm/pixel. Spot size diameter is ∼6 mm. Color images available online at www.liebertonline.com/ast
