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Nakamura Formation Saga, 1917 ex Yabe, 1921

• Type locality: Nakamura, Mitake city, Kani county, Gifu prefecture
• Coherent formation
• First Seto Inland Sea
• Sedimentary basin in island arc
• early Miocene (19.6 - 18.4 Ma, FT, K-Ar)

• Sedimentary facies: Lacustrine
• Lithofacies (Upper): Siltstone-dominant interbedded sandstone and siltstone
• Lithofacies (Upper, Minor): Lignite
• Lithofacies (Lower): Sandstone-dominant interbedded sandstone and siltstone
• Sedimentary structures: Parallel stratification, Trough cross-stratification

• Thickness: ca. 200 m
• Upper limit: Unconformity (Hiramaki Formation, Tokai Group, Zenjino Terrace Deposits)
• Lower limit: Conformity (Hachiya Formation), Unconformity (Mino Belt, Ryoke Belt)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Nakamura, Mitake city, Kani county, Gifu pref.; Sugekari, Kani city, Gifu pref.; Shin-Ohta bridge, Minokamo city, Gifu pref.; Zenjino, Inuyama city, Aichi pref.
• Fossils: Mammalia (Amphitragulus minoensis, Palaeotapirus yagii), Shellfishes (Anodonta sp., Viviparus sp.)
• Fossils (Hiyoshi flora): Acer chharae, Acer nordenskioeldi, Acer palaeorufinerve, Acer rotundatum, Aesculus majus, Alangium aequalifolium, Alnus kefersteinii, Alnus prenepalensis, Alnus usyuensis, Betula mioluminifera, Betula nathorsti, Belula uzenensis, Carpinus mioturczaninowii, Carpinus stenophylla, Carpinus subyedoensis, Carya miocathayensis, Castanea miomollissima, Celtis sp., Cercis aff. miochinensis, Corylus subsieboldiana, Fagus antipofi, Juglans japonica, Metasequoia occidentalis, Lindera gaudini, Liquidambar miosinica, Liquidambar sp. (Leaves, Fruits), Magnolia miocenica, Nymphar ebae, Parrotia aff. fagifolia, Phragmites sp.Populus balsamoides, Pseudolarix japonica, Pterocarya asymmetrosa, Rhus aniaiensis, Salix varians, Salix sp., Tilia hommashinichii, Tilia protojaponica, Ulmus mionoensis, Ulmus miopumila, Ulmus pseudolongifolia, Ulmus subparvifolia, Ulmus takayasui, Zelkova ungeri

• Shinjoe et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.7, pp.533-538 DOI
• Ina et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.10, pp.542-545 DOI
• Yoshida and Wakita (1999) Geology of the Gifu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 71p. (in Japanese with English abstract 4p.)