Hasshikidaigawa Andesites

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Hasshikidaigawa Andesites Ozawa and Sumi, 1961

Volcanic rocks
late Miocene

Lithofacies: Andesite
Lithofacies (Minor): Dacite, Rhyolite, Andesitic tuff

Upper limit: Conformity (Kuromori Tuff Breccia Member)

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

Otaki Formation (South)
[ Upper ]
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Kozemi Tuff and Mudstone Member
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Nakada Tuff and 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: Hasshikidai river, 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.)