Yukizawa Formation

Volcaic rocks
Back-arc basin volcanism
middle Miocene

Sedimentary facies: Marine
Lithofacies (Top): Kuroko ore
Lithofacies (Main): Rhyolite, Tuff breccia

Upper limit: Conformity
Lower limit: Conformity

Hokuroku region, Akita pref.
[ Upper ]
~~~~~~~~~~~~~~
Shigenai Formation
--------------
Kagoya Formation
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Yukizawa Formation
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Hotakizawa Formation
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Menaichizawa Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Hokuroku region, Akita pref.

Yamada and Yoshida (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.168-179 DOI