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Akaishi Welded Tuff Yamada et al., 1971
- Type locality: Akaishi, Kashimo, Nakatsugawa city, Gifu prefecture
- Volcanic rocks
- Caldera
- Late Cretaceous - Paleogene
- Lithofacies: Rhyolite welded tuff (3 flow units)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Akaishi, Kashimo, Nakatsugawa city, Gifu pref.; Kayamadani valley - Geromatadani valley - Mount Hachioyama - Kadowasagawa river, Gero city, Gifu pref.; Lake Tosenkyo-Kanayamako, Kanayama town, 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.)