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Tokihariyama Formation
- Volcanic rocks
- Oligocene - early Miocene
- Sedimentary facies: Terrestrial, Freshwater
- Lithofacies (Top): Andesite pyroclastic rocks
- Lithofacies (Top, Minor): Tuffaceous sandstone
- Lithofacies (Upper): Andesite lava, Pyroclastic rocks, Hyaloclastite
- Lithofacies (Upper, Minor): Mudstone, Gravel-bearing mudstone
- Lithofacies (Lower): Rhyolite, Dacite
- Lithofacies (Basal, Minor): Breccia
- Oki-Dogo island, Shimane pref.
- [ Upper ]
- ~~~~~~~~~~~~~~
- Kumi Formation
- ~~~~~~~~~~~~~~
- Kori Formation
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- Tokihariyama Formation
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Uzuki - Togogawa river - Nakamura - Chikaishi - Korikawa river - Chikaishigawa river - Masugi - Goka - Nakadani - Minamidani, Okinoshima city, Oki county, Shimane pref.
- Yamauchi et al. (2009) Geology of the Saigo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 118p. (in Japanese with English abstract 3p.)