Fig. 4From: Formation of ferroan dacite by lunar silicic volcanism recorded in a meteorite from the MoonRepresentative Raman spectra of a tridymite and cristobalite and b quartz in the silicic clast. Raman bands of tridymite at 207, 301, 351, and 432 cm−1, cristobalite at 228 and 411 cm−1, and quartz at 199 and 464 cm−1 (e.g., Etchepare et al. 1974; Ling et al. 2011; Seddio et al. 2015) were detectedBack to article page