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Atagi Formation

• Type locality: Atagi, Shirotori town, Gujo city, Gifu prefecture
• Coherent formation
• late Pliocene (Plant fossils)

• Sedimentary facies: Lacustrine
• Lithofacies: Tuff, Tuffaceous sandstone, Mudstone
• Lithofacies (Minor): Lignite
• Lithofacies (Lower, Minor): Diatomite

• Thickness (Lower, Diatomite): ca. 2 m
• Upper limit: Unconformity (Eboshi Volcanic Rocks)

• Distribution: Atagi, Shirotori town, Gujo city, Gifu pref.; Kaibutsu - Hirugano, Gujo city, Gifu pref.
• Fossils (Diatoms): Eunotia sp., Melosira sp., Pinnularia sp.
• Fossils (Minoshirotori flora): Acer mono, Acer rufinerve, Acer sieboldianum, Alnus cfr. hirsuta, Betula maximowicziana, Carpinus cordata, Carpinus laxiflora, Carpinus tschonoskii, Corylus cfr. heterophylla, Cryptomeria cfr. japonica, Diospyros kaki, Elaeocarpus japonica, Fagus crenata, Ficus foveolata, Magnolia obovata, Myriophyllum spicatum, Picea cfr. polita, Pinus aff. trifolia, Potamogeton sp., Quercus crispula, Quercus serrata, Taxus cuspidata, Thujopsis cfr. dolabrata, Tilia japonica, Tilia miqueliana, Trapa mammillifera, Trapa maximowiczii, Trapa natans, Tripetaleia bracteata, Trochodendron aralioides

• Wakita (1984) Geology of the Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 6p.)
• Kawada (1982) Geology of the Mikkamachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 72p. (in Japanese with English abstract 6p.)