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Tsukumo Sandstone Member Shimakura and Tsuchida, 1937

• Type locality: Tsukumo, Kannari, Kurihara city, Miyagi prefecture
• Coherent formation
• middle - late Miocene

• Lithofacies: Sandstone
• Lithofacies (Minor): Iron sands
• Sedimentary structures: Cross stratification

• Thickness: 80 m
• Upper limit: Unconformity (Genbi Formation)

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

• Distribution: Tsukumo - Inarimae - Sappirai, Kannari, Kurihara city, Miyagi pref.
• Fossils: Shellfishes, Diatoms

• Tsuchiya et al. (1997) Geology of the Iwagasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 96p. (in Japanese with English abstract 4p.)