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Nakanoyu Pyroclastic Rocks Harayama, 1990
- Type locality: north of Kama tunnel, Azumi, Matsumoto city, Nagano prefecture
- Volcanic rocks
- Lava dome collapse deposit
- Pleistocene - Holocene
- Sedimentary facies: Pyroclastic flow deposit
- Sedimentary facies (Minor): Pyroclastic fall deposit, Debris avalanche deposit
- Lithofacies (Upper): Lapilli tuff, Volcanic ash
- Lithofacies (Lower): Biotite augite-bearing hypersthene hornblende andesite pyroclstic flow deposit (Many flow units)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: north of Kama tunnel - Nakanoyu hotspring - Shimohorizawa creek, Azumi, Matsumoto city, Nagano pref.
- Oikawa et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.49-61 DOI
- Harayama (1990) Geology of the Kamikochi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 175p. (in Japanese with English abstract 11p.)