[ Top ] [ Japanese ]

Older Fan Deposits

Invalid synonym: Ashiyamada Formation, Hirano Formation

• Coherent formation
• Higher terrace deposits
• middle Pleistocene

• Sedimentary facies: Fluvial
• Sedimentary facies: Tributary deposit
• Sedimentary facies: Alluvial fan deposit
• Paleo-river system: Toyokawa river
• Lithofacies: Breccia

• Thickness: ca. 6 - 30 m
• Upper limit: Unconformity (Younger Fan Deposits, Ishida Formation)
• Lower limit: Unconformity (Tenpakubara Gravel Member)

• Distribution: Nodagawa river - Tomioka, Shinshiro city, Aichi pref.; Osaki town - Otowagawa river - Saikosegawa river - Yamakagegawa river - Ichinomiya town - Mito town - Shirotori town, Toyokawa city, Aichi pref.; Ishimakinishikawa town - Ishimakihagihira town - Oiwa town - Owaki town, Toyohashi city, Aichi pref.; Toyooka town - Otsuka town - Sagara town, Gamagori city, Aichi 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.)