World rocks photo collection
Russia, Caucasus, Karachay-Cherkess Republic, Mushta river valley. Migmatized and hornfelsed quartz-biotite, quartz-biotite-chlorite schists. Khasautskaya metamorphic series. Neoproterozoic.
Russia, Karachay-Cherkess Republic, Arkhyz. Quartz-chlorite-muscovite, quartz-muscovite, quartz schists, paragneisses. Makerskaya series. Proterozoic. Mesoproterozoic- Neoproterozoic.