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I Zone
- Plutonic rocks
- Cretaceous
- Lithofacies: Plutonic rocks
- I Zone
- [ North ]
- ~~~~~~~~~~~~~~
- Omoe Body
- ~~~~~~~~~~~~~~
- Oura Granite
- ~~~~~~~~~~~~~~
- [ South ]
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kitakami mountains, Iwate pref.
- Nishioka and Yoshikawa (2004) Geology of the Ryori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 49p. (in Japanese with English abstract 3p.)