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Uguigawa Welded Tuff Yamada et al., 1971
- Type locality: Uguigawa river, Otaki city, Kiso county, Nagano prefecture
- Volcanic rocks
- Caldera
- Late Cretaceous - Paleogene
- Lithofacies: Rhyolite welded tuff
- Structures: Eutaxitic
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Uguigawa river - Korigase - Tsuchiurazawa creek - Otakigawa river, Otaki city, Kiso county, Nagano pref.; Mount Tochiwakayama - Sawaradani valley, Gero city, Gifu pref.
- Wakita and Koido (1994) Geology of the Gero District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 5p.)
- Mizutani and Koido (1992) Geology of the Kanayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)
- 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.)
- Kawada et al. (1988) Geology of the Hagiwara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 82p. (in Japanese with English abstract 10p.)
- Yamada et al. (1985) Geology of the Takayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)