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Obora Pumice Flow Deposit
- Type locality: Nishinogawa river, Obora, Mitake, Kiso city, Kiso county, Nagano prefecture
- Tephra
- Caldera-forming pyroclastic flow
- late Pleistocene
- Lithofacies: Rhyolite pumice flow deposit (4 flow units)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Obora, Mitake, Kiso city, Kiso county, Nagano pref.
- Takeuchi et al. (1998) Geology of the Kiso-Fukushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 4p.)