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Kobuse Unit (Fujimoto, 1931) Ueki et al., 2013

Invalid synonym: Kobuse Formation

• Type locality: Kobuse, Uenohara city, Yamanashi prefecture
• Accretionary complex
• Deposition: Late Cretaceous, Santonian - Campanian
• Correlation: Madarayama Formation, Masutomi Group

• Sedimentary facies: Marine
• Lithofacies: Coherent facies
• Lithofacies: Broken facies, Mélange facies
• Matrix: Shale
• Lithofacies (Upper): Interbedded sandstone and mudstone
• Lithofacies (Lower): Phyllitic shale
• Lithofacies (Lower, Minor): Sandstone
• Exotic blocks (Crusts): Tuffaceous shale, Chert, Basalt lava, Volcaniclastic rocks, Hyaloclastite, Felsic tuff

• Thickness: ca. 2,000 - 3,500 m
• Upper limit: Thrust fault
• Lower limit: Thrust fault

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

• Distribution: Mount Takao - Annai river - Nakazawa river - Irisawagawa river, Hachioji city, Tokyo metropolis; Lake Shiroyama, Sagamihara city, Kanagawa pref.; Kobotoke pass, Kanagawa pref.; Atsugi city, Kanagawa pref.; Kobuse, Uenohara city, Yamanashi pref.
• Fossils (Radiolarians): Amphipyndax stocki, Dictyomitra aff. koslovae, Dictyomitra multicostata, Pseudoaulophacus florensis

• 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.)
• Saruta and Takahashi (2012) Jour. Geol. Soc. Japan, vol.118, no.1, pp.53-58 DOI
• Sakai (1987) Geology of the Itsukaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 5p.)
• Oka et al. (1979) Geology of the Fujisawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 5p.)