Oishikawa Sandstone Member

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Oishikawa Sandstone Member Ozawa and Sumi, 1961

Type locality: Oishikawa river - Arasho, Mamurogawa city, Mogami county, Yamagata prefecture
Coherent formation
Miocene - Pliocene

Lithofacies: Sandstone-dominant interbedded sandstone and siltstone

Thickness: ca. 230 m
Upper limit: Conformity, partly unconformity (Takasawa Sandstone Member)
Lower limit: Conformity (Sekizawa Tuff Member)

Mamurogawa Formation
[ Upper ]
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Hiraoka Sandstone and Tuff Member
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Takasawa Sandstone Member
-------~~~~~~~
Oishikawa Sandstone Member
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[ Lower ]

Uzen-Kaneyama (Western)
[ Upper ]
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Mamurogawa Formation
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Kamabuchi Formation
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Otaki Formation
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Kaneyama Formation
-------~~~~~~~
Nozoki Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Oishikawa river - Arasho, Mamurogawa city, Mogami county, Yamagata pref.
Fossils (Plants): Cyperites sp., Fagus? sp., Fraxinus? sp., Ulmus cfr. longifolia

Ozawa and Sumi (1961) Uzenkaneyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 66p. (in Japanese with English abstract 5p.)