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Older Fan Deposits

Invalid synonym: Ashiyamada Formation, Hirano Formation

• Coherent formation
• Higher terrace deposits
• Pleistocene

• Sedimentary facies: Fluvial
• Sedimentary facies: Alluvial fan deposit
• Paleo-river system: tributary of Toyokawa river
• Lithofacies: Gravels

• Thickness: ca. 30 m
• Upper limit: Unconformity (Younger Fan Deposits, Ishida Formation)

• Distribution: Nodagawa river - Tomioka, Shinshiro city, Aichi pref.; Osaki town - Otowagawa river - Saikosegawa river - Yamakagegawa river, Toyokawa city, Aichi pref.; Ishimakinishikawa town - Ishimakihagihira town, Toyohashi city, Aichi pref.; Gamagori city, Aichi pref.

• 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.)