Oshima Group

Type locality: Oshima island, Kesennuma city, Miyagi prefecture
Coherent formation
Cretaceous

Oshima Group
[ Upper ]
?--?--?--?--?-
Yokonuma Formation
--------------
Kanaigaura Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Oshima island, Kesennuma city, Miyagi pref.

Kamada (1993) Geology of the Tsuya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 70p. (in Japanese with English abstract 6p.)