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Koshido Formation Machida et al., 1962

• Type locality: Koshido station, Koshido town, Toyota city, Aichi prefecture
• Coherent formation
• late Pleistocene

• Sedimentary facies: Fluvial
• Sedimentary facies: River bed deposit
• Paleo-river system: Yahagigawa river, Kagogawa river
• Lithofacies: Sands, Gravels

• Thickness: ca. 10 - 15 m
• Upper limit: Unconformity (Kagogawa Formation)
• Lower limit: Unconformity (Hekikai Formation, Yadagawa Formation, Fujioka Formation)

• Distribution: Koshido town - Kagogawa river - Yahagigawa river - Toyota town, Toyota city, Aichi pref.; Toyoake city, Aichi pref.; Tenpakugawa river, Chikusa ward, Nagoya city, Aichi pref.

• Nakashima et al. (2021) Geology of the Toyota District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 91p. (in Japanese with English abstract 4p.)