Tomioka Group

Type locality: Tomioka city, Gunma prefecture
Coherent formation
Miocene

Sedimentary facies: Marine

Upper limit: Unconformity (Annaka Group)

Tomioka Group
[ Upper ]
~~~~~~~~~~~~~~
Haradajino Formation
--------------
Obata Formation
--------------
Ushibuse Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Tomioka city, Gunma pref.

Tanaka et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.1, pp.17-24 DOI
Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)