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R4

• Type locality: Ryujin town, Tanabe city, Wakayama prefecture
• Accretionary complex
• Late Cretaceous
• Correlation: Rb, lower Ru

• Sedimentary facies: Marine
• Lithofacies: Sandstone dominant interbedded sandstone and shale
• Lithofacies (Minor): Sandstone

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

• Distribution: Ryujin town, Tanabe city, Wakayama pref.
• Fossils (Radiolarians): Amphipyndax stocki, Amphipyndax sp., Archaeodictyomitra ssp., Dictyomitra formosa, Patulibracchium sp.,

• Tokiwa et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.6, pp.270-273 DOI