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Kosuge Unit (Katsurada, 1956) Ueki et al., 2013

Invalid synonym: Kosuge Formation

• Accretionary complex
• Deposition (Shale): Late Cretaceous, middle Turonian - early Maastrichtian (Radiolarians)
• Accretion: Late Cretaceous, middle Turonian - early Maastrichtian

• Sedimentary facies: Marine
• Lithofacies: Coherent facies
• Lithofacies (Minor): Broken facies
• Lithofacies: Sandstone, Shale Interbedded sandstone and shale
• Lithofacies (Minor): Phyllitic shale, Conglomerate

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

• Shiroyama river - Minamiasakawa river - Hasusawagawa river - Annaigawa river, Hachioji city, Tokyo; Distribution: Hirose dam, Mitomi, Yamanashi city, Yamanashi pref.
• Fossils: Inoceramus cf. amakusensis
• Fossils (Radiolarians): Amphipyndax alamedaensis, Amphipyndax enesseffi, Amphipyndax stocki, Amphipyndax tylotus, Archaeodictyomitra sp., Dictyomitra andersoni, Dictyomitra densicostata, Dictyomitra cf. formosa, Dictyomitra koslovae, Dictyomitra lamellicostata, Dictyomitra multicostata, Dictyomitra napaensis, Orbiculiforma sp., Praeconocaryomma sp., Pseudoaulophacus florensis, Pseudodictyomitra sp., Rhopalosyringlum magnificum, Stichomitra asymbatos, Theocampe abschnitta

• Ueki et al. (2013) Geology of the Hachioji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 137p. (in Japanese with English abstract 6p.)
• Hara et al. (2010) Geology of the Mitsumine District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 110p. (in Japanese with English abstract 4p.)