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Kamitakaku Formation Iwai, 1950
- Type locality: Kamitakaku, Taira, Iwaki city, Fukushima prefecture
- Coherent formation
- southern Yezo Forearc basin (Jobanoki basin)
- early Miocene (16.5 - 16.3 Ma, Diatoms)
- Sedimentary facies: Marine
- Sedimentary facies: Shoreface
- Lithofacies: Conglomerate, Sandstone
- Lithofacies (Minor): Silicified woods
- Sedimentary structures: Imbrication, Trough cross-stratification, Bioturbation
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kamitakaku - Numanouchi seashore, Taira, Iwaki city, Fukushima pref.; Nakagawara - Seitarozawa, Naraha city, Futaba county, Fukushima pref.; Ide river, Tateishi, Naraha city, Futaba county, Fukushima pref.
- Fossils (Shellfishes, Upper Kadonosawa fauna): Acila submirabilis, Anadara watanabei, Buccinum sp., Calliostoma? sp., Clinocardium sp., Crepidula isimotoi, Cyclocardia ferruginea, Dentalium sp., Dosinia (Phacosoma) cf. japonica, Dosinia nagaii, Dosinia nomurai, Ezocallista sp., Lucinoma acutilineata, Lucinoma kamenooensis, Macoma optiva, Macoma tokyoensis, Mactra cf. chinensis, Nassarius simizui, Neverita sp., Panopea japonica, Pinna sp., Pitarina? sp., Polinices meisensis, Pseudocardium sachalinensis, Saccella kongiensis, Siliqua cfr. pulchella, Sinum matsuii, Sinum yabei, Solen sp., Tapes sp., Tectonatica sp., Turbo? sp., Turritella s-hataii, Venericardia siogamensis
- Fossils (Diatoms): Actinocyclus ingens, Actinocyclus ingens forma planus, Actinocyclus octonarius, Actinoptychus senarius, Aulacoseira spp., Cavitatus jouseanus, Cavitatus miocenicus, Cocconeis vitrea, Coscinodiscus marginatus, Coscinodiscus perforatus, Crucidenticula ikebei, Cymatosira debyi, Delphineis miocenica, Delphineis penettiptica, Eucampia sp., Hemioulus bipons, Hyalodiscus sp., Ikebea tenuis, Kisseleviella carina, Odontella aurita, Paralia sulcata, Proboscia interposita, Pseudodimerogramma elliptica, Pyxilla sp., Rhaphoneis sp., Rhizosolenia styliformis, Rouxia naviculoides, Stellarina spp., Stephanogonia hanzawae, Stephanopyxis sp., Stictodiscus kittonianus, Thalassionema cf. hirosakiensis, Thalassionema nitzschioides, Thalassiosira umaoiensis, Thalassiothrix longissima, Triceratium condecorum, Trochosira spinosa
- 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.)