Nakazai Formation

[ Top ] [ Japanese ]

Nakazai Formation

Type locality: Nakasai, Miyamori town, Tono city, Iwate prefecture
Coherent formation
Carboniferous

Lithofacies: Andesitic tuff breccia, Tuff, Calcareous - siliceous slate, Limestone

Thickness: ca. 600 m
Upper limit: Unconformity (Tassobe Formation)

South Kitakami Belt (Ohasama, Iwate pref.)
[ Upper ]
~~~~~~~~~~~~~~
Toyoma Formation
--------------
Kumonoueyama Formation
?--?--?--?--?-
Tassobe Formation
~~~~~~~~~~~~~~
Ozasa Formation
?--?--?--?--?-
Nakazai Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Nakasai - Wakumizu, Miyamori town, Tono city, Iwate pref.
Fossils: Crinoids, Bryozoans

Hirokawa and Yoshida (1956) Ohazama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 9p.)