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Umekami Formation Seki and Imaizumi, 1941

• Coherent formation
• Pleistocene
• Correlation: Matsuzaki Formation

• Lithofacies: Gravels, Sands, Clay

• Lower limit: Unconformity (Ofunato Group, Massaki Group)

• Distribution: Umesaki, Massaki town, Ofunato city, Iwate pref.

• Kambe and Shimazu (1961) Kesennuma, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 16p.)