Miyakojima Formation

Coherent formation
Pliocene - early Pleistocene
Correlation (Upper): Lower part of Osaka Group
Correlation (Lower): Lowermost part of Osaka Group

Sedimentary facies: Freshwater
Lithofacies: Sands and gravels, Sands, Silt, Clay

Upper limit: Conformity (Tanaka Formation)
Lower limit: Unconformity (Granitoids)

Underground of Osaka plain
[ Upper ]
+__+__+__+__+_
Namba Formation
~~~~~~~~~~~~~~
Tanaka Formation
--------------
Miyakojima Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Underground of Osaka plain

Hongo (2009) Jour. Geol. Soc. Japan, vol.115, no.2, pp.64-79 DOI