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Minashi Formation Sasa, 1932

• Coherent formation
• Pleistocene

• Sedimentary facies: Seashore, Shallow marine
• Lithofacies: Iron sand-bearing sands
• Lithofacies (Minor): Gravels
• Sedimentary structures: Parallel stratification, Cross stratificaion

• Thickness: ca. 30 m
• Upper limit: Unconformity (Hirono Formation)
• Lower limit: Unconformity (North Kitakami Belt, Kuji Group, Plutonic rocks)

• Distribution: Ono, Hirono city, Iwate pref.
• Fossils: Mizuhopecten cf. yessoensis, Pecten cf. albicans, Spisula sachalinensis

• Yoshida et al. (1987) Geology of the Rikuchu-Ono District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 70p. (in Japanese with English abstract 6p.)