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Hachimori Andesite Tsuchiya, 1989
- Volcanic rocks
- Submarine volcanic edifice
- Miocene
- Sedimentary facies: Marine
- Lithofacies: Augite hypersthene andesite, Olivine augite andesite lava, Tuff breccia (Hyaloclastite), Lapilli tuff
- Lithofacies (Minor): Dacite lava, Andesite conglomerate, Tuffaceous sandstone
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Hachimori - Nishikawa river - Mount Benkei - Nakanomata river, Sakata city, Yamagata pref.
- Tsuchiya (1989) Geology of the Osawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 6p.)