Sekizawa Tuff Member

[ Top ] [ Japanese ]

Sekizawa Tuff Member Ozawa and Sumi, 1961

Type locality: Sekizawa, Mamurogawa city, Mogami county, Yamagata prefecture
Volcanic rocks
Miocene

Lithofacies: Tuff, Andesite lapilli tuff, Tuff breccia
Lithofacies (Minor): Sandstone, Mudstone

Thickness: 60 m or thicker
Upper limit: Conformity (Oishikawa Sandstone Member)
Lower limit: Bottom of the volcaniclastic rocks dominant horizon
Lower limit: Transitional (Kuriyazawa Sandstone Member)

Kamabuchi Formation
[ Upper ]
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Sekizawa Tuff Member
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Kuriyazawa Sandstone Member
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Ushirokawa Tuff Breccia Member / Awanotaki Tuff Breccia Member
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Haruki Tuff Member / Hasshikidai Mudstone 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: Sekizawa, Mamurogawa 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.)