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Sauramachi Formation (Hanzawa et al., 1953) Ishii et al., 1982

• Type locality: Saura town - Sakae town, Shiogama city, Miyagi prefecture
• Volcanic rocks
• early Miocene

• Sedimentary facies: Terrestrial
• Sedimentary facies: Re-worked pyroclastic rocks
• Lithofacies: Andesitic tuffaceous sandstone, Volcanic conglomerate
• Lithofacies (Minor): Tuff breccia, Tuffaceous siltstone, Tuff, Lignite

• Thickness: ca. 110 - 250 m
• Upper limit: Bottom of pumice tuff-dominant horizon
• Upper limit: Conformity (Ajiri Formation), Unconformity (Toguhama Formation, Kameoka Formation, Tomegaya Formation), Abut unconformity (Irisugaya Formation, Nanakita Formation)
• Lower limit: Bottom of volcanic conglomerate-bearing horizon
• Lower limit: Transitional (Shiogama Formation), Abut unconformity (Rifu Formation)

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

• Distribution: Saura town - Sakae town - Iboishi - Lake Kase, Shiogama city, Miyagi pref.; Hamada, Rifu city, Miyagi county, Miyagi pref.
• Fossils: Eostegodon pseudolatidens
• Fossils (Shiogama flora): Comptoniphyllum sp., Liquidamber sp., Ficus sp.

• 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.)