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Ichinohara Formation (Matsui, 1943)
- Type locality: Togamigawa river, Matsunashinden, Inabe town, Inabe city, Mie prefecture
- Coherent formation
- Fluvio-lacustrine basin including Lake Tokai
- Pliocene
- Transitional (Upper): Kuragari Formation
- Sedimentary facies: Fluvial, Lacustrine
- Sedimentary facies: Alluvial fan, Braided river
- Lithofacies: Gravels, Mud, Sands
- Sedimentary structures: Channel structure, Parallel stratification, Planar cross-stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Matsunashinden - Togamigawa - Sejihara, Inabe city, Mie pref.; Tagirigawa river - Kawahara - Hatake, Hokusei town, Inabe city, Mie pref.; Toki, Kamiishizu town, Ogaki city, Gifu pref.
- Fossils (Plants): Acantopanx sieboldianum, Acer diabolium, Acer miyabei, Acer mono, Acer pictum, Alnus japonica, Alnus pictuma var. glabra, Betula sp., Camellia sp., Carex sp., Carpinus carpinoides, Cornus brachipoda, Corylopsis spicata, Fagus hayatae, Fagus japonica, Gleditschia japonica, Glyptostrobus pensilis, Juglans cinerea, Juglans megacinerea, Liquidambar formosana, Mallotus protojaponicus, Metasequoia disticha, Metasequoia japonica, Nyssa pachycarda, Nssa rugosa, Paliurus nipponicus, Phyllostachys sp., Picea koribai, Platanus sp., Pseudolarix kaempferi, Pterocarys multistriata, Quercus criopula, Quercus cripopullus, Quercus dentata, Quercus serrata, Quercus cf. stenophylla, Quercus variabilis, Rosa sp., Sabia japonica, Sarex sp., Sequoia sempervirens, Sorbus rugosa, Stewrtia monadelpha, Stewartia pseudo-camellia, Styrax japonica, Styrax microcarpa, Syringa amurensis, Trapa macropoda, Tripterygium multipterium, Wistaria ligniata, Zelkova ungeri
- Fossils (Pollen): Liquidambar sp., Nyssa sp.
- Tephra: Dacite Tephra, Ninose Tephra, Hatake Tephra, Kawahara Tephra, Tsuzumi Tephra, Higashitani Tephra, Ichinohara Tephra, Minamidani II Tephra, Bando I Tephra, Bando II Tephra, Otsujishinden Tephra
- Yoshida et al. (1991) Geology of the Kuwana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 154p. (in Japanese with English abstract 5p.)
- Yoshida (1984) Geology of the Yokkaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 5p.)
- Takada et al. (1979) Geology of the Tsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 56p. (in Japanese with English abstract 5p.)
- Miyamura et al. (1976) Geology of the Hikonetobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 6p.)