Oido Tuffaceous Sandstone Member

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Oido Tuffaceous Sandstone Member (Shimakura and Tsuchida, 1939) Ishii et al., 1982

Type locality: Oido, Wakuya city, Toda county, Miyagi prefecture
Coherent formation
Miocene
Correlation: Oido Sandstone Member

Lithofacies: Tuffaceous sandstone
Lithofacies (Minor): Sandy siltstone, Pumice tuff

Thickness: 200 m or thicker
Upper limit: Unconformity (Omotezawa Formation)
Lower limit: Conformity (Asahiyama Andesite Member)

Oido Formation (Wakuya)
[ Upper ]
--------------
Oido Sandstone Member
-------''''/,,,
Nonodake Pyroclastic Member
-------''''/,,,
Wabuchi Conglomerate Member
~~~~~~~~~~~~~~~~
[ Lower ]

Oido Formation (Matsushima)
[ Upper ]
--------------
Oido Tuffaceous Sandstone Member
--------------
Asahiyama Andesite Member
--------------
Kakeyama Conglomerate Member
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Oido, Wakuya city, Toda county, Miyagi pref.; Fumigaeshi - Nakazawa - Hakoshimizu - Kosaki, Ishinomaki city, Miyagi pref.

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.)