Shiroiwazaki Rhyolite Member

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Shiroiwazaki Rhyolite Member Tsushima and Uemura, 1959

Volcanic rocks
early - middle Miocene

Lithofacies: Rhyolite lava
Lithofacies (Minor): Tuff breccia, Tuff

Thickness: ca. 60 m

Fuyube Formation
[ Upper ]
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Bentenjima Rhyolite Member
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Shiroiwazaki Rhyolite Member
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[ Lower ]

Northern Tsugaru peninsula
[ Upper ]
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Nagane Formation
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Fuyube Formation
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Isomatsu Formation
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Gongenzaki Formation
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[ Lower ]

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

Distribution: Shitamae - Cape Shiroiwa, Kodomari, Nakadomari city, Kitatsugaru county, Aomori pref.

Tsushima and Uemura (1959) Kodomari, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 5p.)