Mogami Group

Coherent formation
Miocene

Sedimentary facies: Shallow marine
Lithofacies: Siltstone, Sandstone

Thickness: 850 - 1,000 m

Mogami Group
[ Upper ]
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Kodaira Formation
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Aramachi Formation
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Fukazawa Formation
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[ Lower ]

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

Distribution: Yamagata pref.

Tokunaga (1958) Obanazawa, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 6p.)