The library has grown from its initial release in 1993 to now include 1,497 spectra of mineral samples, grain size fractions, coatings, and mixtures. The 2,457 spectra in version 7 of the library cover wavelengths from the ultraviolet to the far infrared regions of the electromagnetic spectrum (0.2 to 200 µm). Please reference any use of these data with the above citation. The USGS publication cited above describes the instruments used, measurement procedures, contents of metadata descriptions of spectra and samples, and possible artifacts in the spectra. ![]() Geological Survey Data Series 1035, 61 p. Geological Survey (USGS) Spectral Library Version 7 Data Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A.,ĭriscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S.
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