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- Type locality: Mount Yakeishi, Iwate prefecture
- Volcanic rocks
- Lithofacies: Quartz-bearing hypersthene andesite
- Lithofacies (Minor): Lava, Tuff
- Distribution: Mount Yakeishi, Iwate pref.
- Kitamura (1965) Yakeishi-dake, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 40p. (in Japanese with English abstract 8p.)