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Takaku Group Sukai and Matsui, 1953
- Type locality: Kamitakaku - Shimotakaku, Taira, Iwaki city, Fukushima prefecture
- Coherent formation
- southern Yezo Forearc basin (Jobanoki basin)
- early - middle Miocene (Diatoms)
- Sedimentary facies: Marine
- Sedimentary facies: Foreshore - Upper continental slope
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kamitakaku - Shimotakaku, Taira, Iwaki city, Fukushima pref.; Kokozura, Nakoso village, Iwaki city, Fukushima pref.; Hirakata - Oizura, Izura, Otsu village, Kitaibaraki city, Ibaraki pref.
- Ando et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.49-67 DOI
- Kubo et al. (2002) Geology of the Kawamae and Ide District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 136p. (in Japanese with English abstract 6p.)
- Kano et al. (1973) Geology of the Takanuki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 109p. (in Japanese with English abstract 6p.)
- Iwao and Matsui (1961) Taira and Kawamae, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 17p.)