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Younger Fan Deposits

Invalid synonym: Kaminagayama Formation (right bank of Toyokawa river), Ushikawa Formation (left bank of Toyokawa river)

• Coherent formation
• late Pleistocene (MIS 5 - 2)

• Sedimentary facies: Fluvial
• Sedimentary facies: Tributary alluvial fan deposit
• Paleo-river system: Toyokawa river
• Lithofacies: Gravels
• Lithofacies (Minor): Sands, Mud, Peat

• Thickness: ca. 5 m
• Lower limit: Unconformity (Onoda Formation, Older Fan Deposits, Minamioshimizu Formation, Kozakai Formation, Fukue Formation)

• Distribution: Ishimakinishikawa town - Ishimakihagihira town - Ishimakihirano town - Ishimakionoda town - Ishimakihon town - Morioka town - Ushikawa town - Toyooka town - Iwasaki town - Oiwa town - Owaki town, Toyohashi city, Aichi pref.; Tomioka, Shinshiro city, Aichi pref.; Otowagawa river - Yamakagegawa river - Sanzogo town - Mikami town - Hachiman town - Ichida town - Mito town, Toyokawa city, Aichi pref.; Toyooka town - Otsuka town - Sagara town, Gamagori city, Aichi pref.; Kaji, Tahara city, Aichi pref.; Shinjohara - Ota - Ochiba, Kosai city, Shizuoka pref.

• Nakashima et al. (2008) Geology of the Toyohashi and Tahara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 113p. (in Japanese with English abstract 3p.)
• Miyazaki et al. (2008) Geology of the Goyu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 97p. (in Japanese with English abstract 3p.)