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Tonami Gravel Member (Kuroda, 1958)

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

• Sedimentary facies: Fluvial, Brackish
• Sedimentary facies: Incised valley-fill deposit , River mouth
• Sedimentary facies: River channel deposit
• Lithofacies: Gravels
• Sedimentary structures: Trough cross-stratification, Parallel stratification

• Thickness: 2 - 7 m
• Upper limit: Transitional (Terasawa Mud Member), Conformity (Sugiyama Sand Member, Takamatsu Muddy Sand Member, Washizu Mud Member)
• Lower limit: Unconformity (Toshima Sand and Gravel Member)

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

• Distribution: Tonami, Shiroshita town, Toyohashi city, Aichi pref.; Nishinanane town, Toyohashi city, Aichi pref.; Higashikanbe town - Okusa town, Tahara city, Aichi pref.; Dodo, Mutsure town, Tahara city, Aichi pref.
• Fossils (Shellfishes): Anadara subcrenata, Batillaria zonalis, Cerithidea djadjariensis, Cyclina orientalis, Protothaca jedoensis

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