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Obonai Granodiorite Kano, 1966
Invalid synonym: Obonai Pluton, Obonai Body
- Type locality: Obonai river, Senboku city, Akita prefecture
- Plutonic rocks
- Cretaceous (103 Ma, K-Ar)
- Intruded by: Andesite
- Lithofacies: Hornblende biotite granodiorite
- Lithofacies (Minor): Tonalite, Biotite granite
- Obonai Granodiorite
- [ Young ]
- ~~~~~~~~~~~~~~
- Biotite granite
- ~~~~~~~~~~~~~~
- Hornblende biotite granodiorite
- ~~~~~~~~~~~~~~
- [ Old ]
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Obonai river - Mount Jimori - Mount Aizawa, Senboku city, Akita pref.
- Suto and Ishii (1987) Geology of the Shizukuishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 142p. (in Japanese with English abstract 5p.)