Nakada Tuff and Mudstone Member

[ Top ] [ Japanese ]

Nakada Tuff and Mudstone Member Ozawa and Sumi, 1961

Type locality: Nakada, Kaneyama city, Mogami county, Yamagata prefecture
Coherent formation
late Miocene

Lithofacies: Tuff, Mudstone
Lithofacies (Minor): Sandstone, Basaltic lapilli tuff, Andesitic lapilli tuff, Rhyolitic lapilli tuff

Thickness: 150 - 200 m
Upper limit: Bottom of the andesitic tuff breccia bed
Upper limit: Transitional (Kozemi Tuff and Mudstone Member)
Lower limit: Conformity (Ryubasan Andesites, Taya Tuff Member)

Otaki Formation (North)
[ Upper ]
--------------
Kuromori Tuff Breccia Member
--------------
Hasshikidaigawa Andesites
--------------
Otaki Mudstone and Tuff Member
--------------
Kagamizawa Mudstone Member
--------------
[ Lower ]

Otaki Formation (South)
[ Upper ]
--------------
Kozemi Tuff and Mudstone Member
--------------
Nakada Tuff and Mudstone Member
--------------
[ Lower ]

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

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

Distribution: Nakada - Mount Yakushi, Kaneyama city, Mogami county, Yamagata pref.

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.)