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- Plutonic rocks
- Late Cretaceous
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Orikabe - Yagoshi - Mount Yagoshi - Mount Sasamori - Mount Kuromori, Murone town, Ichinoseki city, Iwate pref.; Mount Kumayama - Monomi, Kesennuma city, Miyagi pref.
- Takeuchi and Mikoshiba (2002) Geology of the Senmaya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 76p. (in Japanese with English abstract 3p.)