Osakawan Formation

Coherent formation
Holocene

Sedimentary facies (Lower): Brackish
Lithofacies (Upper): Clay, Sands
Lithofacies (Lower): Silt, Clay
Lithofacies (Lower, Minor): Sands

Thickness: ca. 30 m
Lower limit: Unconformity (Itami Formation)

Osakawan Formation
[ Upper ]
--------------
Umeda Formation
--------------
Nanko Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nankoohashi bridge, Nanko, Osaka city, Osaka pref.

Huzita and Kasama (1982) Geology of the Osaka-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 8p.)