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Matsushimawan Group

• Coherent formation
• Miocene
• Correlation: lower Natori Group

• Sedimentary facies (Upper): Marine
• Sedimentary facies (Lower): Terrestrial - Brackish
• Lithofacies:

• Upper limit: Unconformity (Shida Group)
• Lower limit: Unconformity (Rifu Formation)

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

• Distribution: Matsushima bay - Rifu city - Tagajo city, Miyagi pref.

• Kitamura et al. (1986) Geology of the Sendai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 134p. (in Japanese with English abstract 9p.)
• Ishii et al. (1983) Geology of the Shiogama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 6p.)
• Ishii et al. (1982) Geology of the Matsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 9p.)