Nishinosawa Formation

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Nishinosawa Formation Uemura, 1983

Invalid synonym: Kuraokagawa Formation

Type locality: Nishinosawa creek, Shimizu river, Hiranai city, Higashitsugaru county, Aomori prefecture
Coherent formation
Miocene (Nishikurosawa stage, Foraminifera)

Sedimentary facies: Marine
Lithofacies: Shale
Lithofacies (Minor): Sandy tuff, Augite hornblende quartz diorite porphyrite, Pyroxene porphyrite

Thickness: 50 - 100 m or thicker
Lower limit: Unconformity (Kanegasawa Formation)

Kamikita, Aomori pref.
[ Upper ]
~~~~~~~~~~~~~~
Moura Andesites
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Sasamoriyama Volcanic Rocks
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Wadagawa Formation
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Yotsuzawa Formation
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Nishinosawa Formation
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Kanegasawa Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nishinosawa creek, Shimizu river, Hiranai city, Higashitsugaru county, Aomori pref.; Mount Azuma, Aomori city, Aomori pref.; Nei river, Kugurizaka, Aomori city, Aomori pref.
Fossils (Foraminifera): Gaudryina cf. trullissatam, Martinottiella communis

Uemura (1983) Geology of the Asamushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 40p. (in Japanese with English abstract 4p.)