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Hakonokuchi Formation (Morita, 1930) Hanzawa et al., 1958
Invalid synonym: Hakonokuchi Group
- Type locality: Hakonoguchi, Oguni city, Nishiokitama county, Yamagata prefecture
- Accretionary complex
- Deposition: Jurassic? - Cretaceous?
- Metamorphism: Late Cretaceous (80 Ma, K-Ar)
- Intruded by: Biotite granite
- Sedimentary facies: Marine
- Metamorphic facies: Amphibolite
- Lithofacies: Hornfels
- Lithofacies (Protolith): Interbedded shale and sandstone
- Ashio Belt (Iide city, Yamagata pref.)
- [ Upper ]
- /--/--/--/--/-
- Hakonokuchi Formation
- /--/--/--/--/-
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Hakonoguchi - Kanomizu - Shirakozawa, Oguni city, Nishiokitama county, Yamagata pref.
- Yanagisawa and Yamamoto (1998) Geology of the Tamaniwa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 4p.)