[ Top ] [ Japanese ]

Aoya Tuff Yamada et al., 1985

• Type locality: Aoyagawa river, Aoya, Asahi town, Takayama city, Gifu prefecture
• Volcanic rocks
• Caldera
• Late Cretaceous - Paleogene
• Correlation: Atera Formation
• Intruded by: Aoya Arculate Dyke

• Lithofacies: Rhyolite tuff, Lapilli tuff
• Lithofacies (Minor): Tuffaceous mudstone, Tuffaceous sandstone, Conglomerate
• Lithofacies (Basal, Minor): Conglomerate

• Thickness: 20 - 50 m or thicker
• Thickness (Basal): ca. 5 m
• Upper limit: Unconformity (Kuzogawa Welded Tuff)
• Lower limit: Unconformity (Higashimata-Funayama Welded Tuff, Onishi Formation)

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

• Distribution: Aoyagawa river - Nagakurahondani valley - Terasawa - Asai - Hidagawa river, Asahi town, Takayama city, Gifu pref.; Inohana - Tokugodani valley, Takane town, Takayama city, Gifu pref.; Yanajima, Kuguno town, Takayama city, Gifu pref.

• 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.)