Yunokogawa Sandstone and Mudstone Member

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Yunokogawa Sandstone and Mudstone Member

Type locality: Yunokogawa, Mutsu city, Aomori prefecture
Coherent formation
Miocene

Lithofacies: Interbedded sandstone, conglomerate and mudstone

Upper limit: Conformity (Yunokawa Green Tuff Member)
Lower limit: Conformity (Yunokawa Green Tuff Member)

Yagen Formation (Sai, Aomori pref.)
[ Upper ]
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Yunokawa Green Tuff Member / Yunokogawa Sandstone and Mudstone Member
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[ Lower ]

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

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

Distribution: Yunokogawa, Mutsu city, Aomori pref.
Fossils (Shellfish): Protothaca? sp., Panope japonica, Arca sp., Patinopecten cf. sagamianus, Lima (Acesta) sp., Fulgoralia sp., Venerupis? sp., Monia radiata, Venericardia sp., Chlamys swiftii, Chlamys sp., Cancellaria sp., Margarites sp., Crassatellites sp., Anadara sp., Periploma? sp.

Uemura (1962) Oma and Sai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 6p.)