Shigenai Formation

Coherent formation
Island arc
late Miocene

Sedimentary facies: Marine
Lithofacies: Interbedded tuff and mudstone, Interbedded tuff and siltstone

Upper limit: Unconformity
Lower limit: Conformity

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