Okuhinotsuchi Formation

Coherent formation
Silurian

Lithofacies: Limestone
Lithofacies (Minor): Sandstone, Welded tuff

Upper limit: Conformity (Nakazato Formation)
Lower limit: Unconformity (Hikami Granites)

South Kitakami Belt (Hikoroichi - Setamai, Iwate pref.)
[ Upper ]
?--?--?--?--?-
Choanji Formation
~~~~~~~~~~~~~~
Nakazato Formation
--------------
Okuhinotsuchi Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Iwate pref.

Kawamura et al. (2013) Geology of the Hayachine San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)