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Yunotani Lava
- Type locality: 2,100 m above sea level, Yunotani valley, Osaka town, Gero city, Gifu prefecture
- Volcanic rocks
- late Pleistocene
- Sedimentary facies (Upper): Lava hill
- Lithofacies: Augite-bearing hornblende hypersthene rhyolite lava (2 flow units), Pyroclastic flow deposit
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nigorigogawa river - Yunotani valley - Shintani valley - Shakunanzotani valley, Osaka town, Gero city, Gifu pref.; Otakigawa river - Nigorikawa river - Shirokawa river - Akagawa river, Otaki city, Kiso county, Nagano pref.
- Tephra: On-Pm3'
- Yamada and Kobayashi (1988) Geology of the Ontakesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 9p.)