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R5

• Type locality: Hidakagawa river, Ryujin town, Tanabe city, Wakayama prefecture
• Accretionary complex
• Late Cretaceous, late Campanian
• Correlation: Rc, upper Ru

• Sedimentary facies: Marine
• Lithofacies: Shale
• Lithofacies (Minor): Shale dominant interbedded sandstone and shale, Acidic tuff, Greenstones, Gravel-bearing mudstone
• Paleocurrent (Longitudinal current flow): to West
• Paleocurrent (Lateral current flow): to South - Southwest

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

• Distribution: Hidakagawa river - Yunono - Koyabugawa river - Nishinokawatani valley - Higashinokawatani valley - Mount Gakematayama, , Ryujin town, Tanabe city, Wakayama pref.; Seinishigawa river - Katago, Totsukawa city, Yoshino county, Nara pref.
• Fossils (Radiolarians): Amphipyndax pseudoconulus, Amphipyndax stocki, Amphipyndax tylotus, Amphipyndax sp., Archaeodictyomitra squinaboli, Archaeodictyomitra vulgaris, Archaeodictyomitra ssp., Cryptamphorella conara, Cryptamphorella macropora, Dictyomitra crassispina, Dictyomitra formosa, Dictyomitra cf. koslovae, Dictyomitra multicostata, Dictyomitra sp., Lithomelissa heros, Myllocercion aff. echtus, Myllocercion sp., Patellula sp., Pseudoaulophacus floresensis, Pseudoaulophacus sp., Rhopalosyringium kleinum, Rhopalosyringium magnificum, Stichomira carnegiense, Stichomira sp., Xitus grandis
• Fossils (Trace fossils): Terebellina isp.

• Tokiwa et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.6, pp.270-273 DOI
• Tokuoka et al (1981) Geology of the Ryujin District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 6p.)