Ikokuma Agglomerate Member

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Ikokuma Agglomerate Member

Volcanic rocks
Miocene

Lithofacies: Andesitic agglomerate
Lithofacies (Minor): Andesitic tuff, Andesite lava, Pumiceous tuff, Sandstone, Mudstone

Ikokuma Andesites (Ohata river)
[ Upper ]
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Ogawame Agglomerate Member
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Ikokuma Agglomerate Member
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[ Lower ]

Oma, Aomori pref.
[ Upper ]
~~~~~~~~~~~~~~
Ikokuma Andesites
'''''''/,,,,,,
Oma Formation
?--?--?--?--?-
[ Lower ]

Sai - Ohata river, Aomori pref.
[ Upper ]
~~~~~~~~~~~~~~
Ikokuma Andesites
~~~~~~~~~~~~~~
Yagen Formation
~~~~~~~~~~~~~~
Sai Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Ikokuma river - Ikokuma, Kazamaura city, Shimokita county, Aomori pref.; Ohata river, Mutsu city, Aomori pref.

Uemura and Saito (1957) Ohata, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 8p.)