[ Top ] [ Japanese ]
Takizawagawa Formation (Hirabayashi, 1966) Yamamoto and Komazawa, 2004
Invalid synonym: Oshio Formation, Ogawazawa Formation, Otani Formation, Tamanashi Formation, Nishikata Formation
- Type locality: Takizawa river, Kaneyama city, Onuma county, Fukushima prefecture
- Volcanic rocks
- Lava domes
- early - middle Miocene (23?, 16, 15 Ma, K-Ar)
- Contemporaneous heterotopic facies: Higashiomata Formation
- Intruded by: Basalt dikes, Sills
- Sedimentary facies: Marine
- Sedimentary facies (Rhyolite): Gravity flow deposit, Submarine pyroclastic flow deposit
- Lithofacies: Rhyolite lava dome
- Lithofacies (Main): Lava, Volcanic breccia, Tuff breccia, Lapilli tuff, Volcanic sandstone, Tuff
- Lithofacies (Minor): Mudstone, Basalt
- Sedimentary structures: Graded bedding, Parallel stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Takizawa river - Shirasawa river - Tadami river, Kaneyama city, Onuma county, Fukushima pref.; Tadami city, Minamiaizu county, Fukushima pref.; Hayato - Miyashita - Takiya, Mishima city, Onuma county, Fukushima pref.; Nishiaizu city, Yama county, Fukushima pref.
- Yamamoto and Hasebe (2014) Jour. Geol. Soc. Japan, vol.120, no.1, pp.1-9 DOI
- Masubuchi and Ishizaki (2011) Jour. Geol. Soc. Japan, vol.117, no.6, pp.357-376 DOI
- Yamamoto and Komazawa (2004) Geology of the Miyashita District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 71p. (in Japanese with English abstract 5p.)