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Koda Formation (Ueki and mitusio, 1998) Noda et al., 2017
Invalid synonym: Fukudahara Formation, Yamamoto Formation, Iruhi Formation, Komatsubara Formation, Ushiroyama Formation, Kinosaki Formation, Shiota Formation, Tsubakidani Formation
- Type locality: Koda, Yamamoto town, Mitoyo city, Kagawa prefecture
- Coherent formation
- early Pleistocene, Calabrian
- Contemporaneous heterotopic facies: Saita Formation, Yakeo Formation
- Sedimentary facies: Fluvial
- Lithofacies: Sands, Silt
- Lithofacies (Minor): Gravels
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Koda - Tsuji - Kochi - Saitanaka - Hagata - Samata - Haimyo - Lake Iwaseike - Kamiasa, Mitoyo city, Kagawa pref.; Hagihara - Fukudahara, Kanonji city, Kagawa pref.; Kurokawa - Ushiroyama - Sabumi - Ikama - Lake Mannoike - Soda, Manno city, Nakatado county, Kagawa pref.
- Fossils: Stegodon sugiyamai, Palaeoloxodon naumanni?, Bivalves, Gastropods, Diatoms (Freshwater)
- Fossils (Insects): family Carabidae, family Dytiscidae, family Silphidae, family Elateridae, subfamily Donaciinae, family Curculioidae, Cocoon
- Fossils (Plants): Menyanthes sp., Metasequoia sp., Picea maximowiczii, Pseudotsuga subrotunda
- Tephra: Koda 1, Sako, Otaniike, Nakakochi, Kamikochi, Fukurami?, Miyaoku 1, Miyaoku 2, Miyaoku 3
- Noda et al. (2021) Geology of the Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 150p. (in Japanese with English abstract 5p.)
- Noda et al. (2017) Geology of the Kan-onji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 96p. (in Japanese with English abstract 4p.)