Raman spectra of ooids

These are Raman spectra for the paper entitled "Authigenic biosignatures of microbial biomass preserved as carbonate ooids formed by abiotic chemically oscillating reactions throughout Earth history" by Dominic Papineau, Danielle Frances Vosper, Ritesh Purohit, Estelle Janin, Deng Liu, Jingbin Wang, and Zhenbing She.