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Koisewan Formation Akamine, 1962

• Coherent formation
• Shimosueyoshi transgressive deposit
• Pleistocene (Shimosueyoshi stage)
• Correlation: lower Atsuta Formation

• Sedimentary facies: Marine
• Sedimentary facies: Inner bays
• Lithofacies: Silt, Clay
• Lithofacies (Minor): Sands

• Thickness: 10 - 30 m

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

• Distribution: Mie pref.

• Yoshida et al. (1991) Geology of the Kuwana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 154p. (in Japanese with English abstract 5p.)
• Yoshida (1987) Geology of the Tsu-Tobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 72p. (in Japanese with English abstract 5p.)
• Yoshida (1984) Geology of the Yokkaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 5p.)