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Akaishi Group Kano and Matsushima, 1988

A member of Northern Shimanto Belt

Invalid synonym: Senjodake Belt

• Type locality: Mount Senjogatake - Mount Akaishidake, Nagano prefecture - Yamanashi prefecture - Shizuoka prefecture
• Accretionary complex
• Deposition (Mudstone): Early Cretaceous, Albian - Late Cretaceous, Turonian (Radiolarians)
• Deposition: Early Cretaceous, Albian - Late Cretaceous, Cenomanian (Radiolarians)
• Deposition: Early Cretaceous, Aptian - Albian (125.8 - 107.5 Ma, U-Pb)
• Accretion: Neogene
• Intruded by: Kaikoma Granite, Hoo Granite, Porphyrite

• Sedimentary facies: Marine
• Sedimentary facies: Turbidite
• Lithofacies: Sandstone, Sandstone-dominant interbedded sandstone and mudstone
• Lithofacies (Minor): Mudstone-dominant interbedded sandstone and mudstone, Mudstone
• Exotic blocks (Crusts): Basalt, Chert, Limestone
• Sedimentary structures: Graded bedding

• Thickness: 1,500 - 2,500 m
• Distribution (Width): 6 km
• Upper limit: Butsuzo Tectonic Line (Chichibu Belt)

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

• Distribution: Mount Senjogatake, Ina city, Nagano pref. - Minamiarupusu city, Yamanashi pref.; Mount Akaishidake, Oshika city, Shimoina county, Nagano pref. - Aoi ward, Shizuoka city, Shizuoka pref.; Koshibu river - Daishojidaira, Oshika city, Shimoina county, Nagano pref.; Kamanashi river, Fujimi city, Suwa county, Nagnao pref.; Wada, Minamishinano, Iida city, Nagano pref.; Shiozawa hot spring, Hakushu town, Hokuto city, Yamanshi pref.; Kokkai bridge, Nagano pref. - Yamanashi pref.; Mount Kitadake, Minami-Alps city, Shizuoka pref.; Mount Arakawadake - Mount Tekaridake, Shizuoka pref.; Mount Kamikochidake, Shizuoka city, Shizuoka pref.; Mount Tosakayama, Kawanehoncho city, Haibara county, Shizuoka pref.;

• Ozaki and Sugiyama (2018) Geology of the Minobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 169p. (in Japanese with English abstract 7p.)
• Tokiwa et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.7, pp.539-544 DOI
• Makimoto et al. (1996) Geology of the Takato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 6p.)
• Kawachi (1977) Geology of the Yatsugatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 92p. (in Japanese with English abstract 4p.)