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Takadaru Welded Tuff Yamada et al., 1971

• Type locality: Takadarudani valley, Tsukechigawa river, Kashimo, Nakatsugawa city, Gifu prefecture
• Volcanic rocks
• Caldera
• Late Cretaceous - Paleogene
• Intruded by: Tochiharatani Granodiorite Porphyry, Iwase Granodiorite Porphyry Sami-Kadowasa Parallel Dike Swarm, Hornblende porphyry, Biotite dacite, Andesite dikes
• Correlation: Akadani Welded Tuff, Kuzogawa Welded Tuff

• Lithofacies: Rhyolite welded tuff (more than 2 flow units)
• Lithofacies (Minor): Conglomerate, Pumice tuff, Lapilli tuff, Tuffaceous sandstone, Mudstone
• Structures: Eutaxitic

• Thickness: ca. 500 - 1,000 m
• Thickness (Clastic rocks): ca. 10 - 20 m
• Upper limit: Unconformity (Uguigawa Welded Tuff)
• Lower limit: Conformity (Atera Formation), Unconformity (Higashimata-Funayama Welded Tuff, Sawando Complex, Dokyo Granodiorite Porphyry), Abut unconformity (Ako Welded Tuff)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Takadarudani valley, Tsukechigawa river, Kashimo, Nakatsugawa city, Gifu pref.; Wara, Gujo 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.)