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Umeda Formation

• Coherent formation
• Holocene (ca. 8 ka - Present)

• Sedimentary facies: Marine
• Sedimentary facies: Inner bay
• Sedimentary facies: Delta
• Sedimentary facies (Upper): Delta plain
• Sedimentary facies: Delta front
• Lithofacies (Upper): Gravel-bearing sands
• Lithofacies: Clay

• Thickness (Upper): 4 m
• Thickness: ca. 20 m

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

• Distribution: Nankoohashi bridge, Nanko, Osaka city, Osaka pref.
• Fossils: Shellfishes

• 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.)