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Saita Formation (Saito and Nakayama, 1954) Ueki and Mitusio, 1998
Invalid synonym: Saita Gravel, Sugaya Gravel, Otaniike Gravel, Mannoike Silt-Sand, Ebata Sand and Gravel, Gomo Gravel, Inoo Gravel
- Type locality: Nagano, Saitanaka, Saita town, Mitoyo city, Kagawa prefecture
- Coherent formation
- late Pliocene, Piaenzian - early Pleistocene, Calabrian
- Contemporaneous heterotopic facies: Koda Formation
- Sedimentary facies: Fluvial
- Lithofacies: Gravels
- Lithofacies (Minor): Sands, Silt, Lignite
- Sedimentary structures: Channel structure, Trough cross-stratification
- Paleocurrent: from East to West
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Saitanaka - Nagano - Ono - Kamitakano - Hagata - Yamamoto - Kochi - Kijio - Arato - Motoshino, Mitoyo city, Kagawa pref.; Uchinono - Fukudahara, Kanonji city, Kagawa pref.; Shinme - Lake Mannoike - Gomo - Ebata - Soda - Yamawaki - Fukurami - Naiden - Yakeo, Manno city, Nakatado county, Kagawa pref.; Inoo - Sogisho, Ayagawa city, Ayauta county, Kagawa pref.
- Fossils (Insects): family Carabidae, family Dytiscidae, family Hydrophilidae, family Staphylinidae, Plateumaris constricticollis, Cocoon
- Fossils (Plants): Cunninghamia sp., Cyclocarya sp. (<= Pterocarya cf. paliulus), Juglans megacinerea, Menyanthes sp., Metasequoia disticha, Picea koribai, Picea maximowiczii, Pseudotsuga subrotunda
- Tephra: Iruhi, Kamikochi, Fukurami
- 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.)