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Ainokaze Formation Igarashi, 1967

• Type locality: Ainokaze park, Joetsu city, Niigata prefecture
• Coherent formation
• Ainokaze terrace deposit
• late Pleistocene, Riss-Würm interglacial stage
• Correlation: Higher terrace deposit (Kashiwazaki city), Shimosueyoshi Formation, Higher terrace deposit (Joetsu city)

• Lithofacies: Clay, Sands, Gravels

• Thickness: ca. 6.8 m or thicker
• Upper limit: Unconformity (Hirayama Formation, Hirayama Loam)
• Lower limit: Unconformity (Kota Formation)

• Distribution: Ainokaze park, Joetsu city, Niigata pref.
• Fossils (Plants): Abies homolepis, Acer pictum, Aesulus turbinata, Alnus japonica, Carex sp., Carylus heterophylla var. thunbergii, Carylus sieboldiana, Cephalotaxus drupacea, Cornus controversa, Cryptomeria japonica, Fagus crenata, Fraxinus japonica, Haloragis micrantha, Juglans mandshurica subsp. sieboldiana, Lagerstroemia sp., Magnolia kobus, Magnolia obovata, Menyanthes trifoliata, Phellodendron amurense, Picea polita, Pterocarya rhoifolia, Quercus serrata, Sapium sebiferum, Sapium sebiferum var. pleistoceaca, Scirpus sp., Sparganium glomeratum, Styrax japonica, Styrax obassia, Tilia maximowiczii, Trapa macropoda, Trapa nalans var. quadrispinosa, Viburunum sp., Vilis flexuosa, Xanthoxylum piperitum
• Fossils (Pollen): Abies sp., Juglans sp., Picea sp., Pinus sp., Tsuga sp.

• Akahane and Kato (1989) Geology of the Takada-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 3p.)