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Omotezawa Formation Ishii et al., 1982

• Type locality: Omotezawa, Ishinomaki city, Miyagi prefecture
• Coherent formation
• Pliocene
• Correlation: Mukaiyama Formation, Onuki Formation, Yamashita Formation

• Sedimentary facies: Terrestrial
• Lithofacies: Interbedded siltstone, sandstone and tuff
• Lithofacies (Minor): Lignite
• Lithofacies (Basal): Conglomerate
• Sedimentary structures (Basal) Cross stratification

• Thickness: ca. 10 - 30 m
• Thickness (Basal): 2 - 4 m
• Upper limit: Conformity (Tawaraniwa Formation)
• Lower limit: Unconformity (Kakeyama Conglomerate Member, Oido Tuffaceous Sandstone Member, Tatsunokuchi Formation)

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

• Distribution: Omotezawa - Sawada, Ishinomaki city, Miyagi pref.
• Fossils (Plants): Carex sp., Sequoia affinis, Wistaria fallax
• Fossils (Pollen): Abies sp., Alnus sp., Artemisia sp., Carya sp., Celtis-Aphananthe, Cyclobalanopis sp., Fagus sp., Lepidobalanus sp., Liquidamber sp., Lycopodium sp., Osmunda sp., Persicaria sp., Picea sp., Pinus sp., Pterocarya sp., cf. Selaginella sp., Symplocos sp., Tsuga sp., Ulmus-Zelkova

• Takizawa et al. (1984) Geology of the Ishinomaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 7p.)
• 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.)