Raman map (left) and transmitte light optical image (right) of a subduction zone rock section from Sifnos (Greece). The Raman image highlights distribution of quartz, spessartine, titanite, biotite and glaucophane species.
Data courtesy of Kyle Ashley, Mark Caddick, Matthew Steele-MacInnis, and Robert Bodnar Department of Geosciences, Virginia Polytechnic Institute and State University, United States of America.