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Ryuhozan Metamorphic Rocks

• Type locality: Kumamoto prefecture
• Deposition: early - middle Permian (Fusulinids)
• Metamorphism: Cretaceous (120 - 90 Ma, K-Ar, Rb-Sr)

• Metamorphic facies: Low grade
• Lithofacies: Mafic schist, Felsic schist, Psammitic schist, Pelitic schist, Limestone, Chloritoid schist
• Lithofacies (Protolith, Top): Limestone
• Lithofacies (Protolith, Upper): Acidic volcanic rocks
• Lithofacies (Protolith, Middle): Sandy rocks, Laterite
• Lithofacies (Protolith, Lower): Basic - acidic volcanic rocks

• Upper limit: Thrust fault
• Lower limit: Thrust fault

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Kumamoto pref.
• Fossils: Fusulinids

• Osanai et al. (2014) Jour. Geol. Soc. Japan, vol.120, Supplement, pp.79-100 DOI