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Igarashi Pyroclastic Flow Deposit
- Volcanic rocks
- early Pleistocene
- Intruded by: Quartz hypersthene hornblende andesite - dacite dyke
- Lithofacies: Pyroclastic flow deposit (3 flow units)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Igarashi, Yuzawa city, Minamiuonuma county, Niigata pref.
- Chihara et al. (1981) Geology of the Echigo-Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 108p. (in Japanese with English abstract 8p.)