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Kasagatake Rhyolites
Invalid synonym: Kasagatake cauldron
- Type locality: Kurotani valley, Ashiaraidani valley, Okuhidaonsengo, Takayama city, Gifu prefecture
- Volcanic rocks
- Composite caldera formed by 3 times collapse
- Late Cretaceous (68 - 57 Ma, Rb-Sr)
- Ring dike: Late Cretaceous (68-57 Ma, Rb-Sr)
- Intruded by: Okumarusawa Granite
- Intruded by (Outer margin, Ring dike): Granite porphyry dike
- Lithofacies: Rhyolite, Rhyolitic dacite
- Lithofacies (Top): Pyroclastic flow deposit
- Lithofacies (Upper): Pyroclastic flow deposit, Lava
- Lithofacies (Minor): Rhyolite lava domes
- Lithofacies (Lower): Pyroclastic flow deposit, Pyroclastic fall deposit, Stratovolcanic clastic rocks
- Lithofacies (Ring dike): Granite porphyry, Granodiorite
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Takayama city, Gifu pref.
- Distribution (Ring dike): Kurotani valley - Waridani valley - Sodegadani valley, Okuhidaonsengo, Takayama city, Gifu pref.
- Harayama et al. (1991) Geology of the Yarigatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 190p. (in Japanese with English abstract 8p.)
- Harayama (1990) Geology of the Kamikochi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 175p. (in Japanese with English abstract 11p.)