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Gumihara Formation Ikeda and Kikuchi, 2001

• Type locality: Higashiakasawa town, Toyohashi city, Aichi prefecture
• Coherent formation
• middle Pleistocene

• Upper limit: Unconformity
• Lower limit: Unconformity (Toyohashi Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Higashiakasawa town, Toyohashi city, Aichi pref.
• Tephra: Ata-Th

• Nakashima et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.70-79 DOI