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Namba Formation

• Coherent formation
• Holocene

• Sedimentary facies (Upper): Fluvial, Lacustrine
• Sedimentary facies (Middle): Marine
• Sedimentary facies (Lower): Fluvial, Lacustrine
• Lithofacies (Upper): Sands
• Lithofacies (Upper, Minor): Silt, Gravels
• Lithofacies (Middle): Ma 13
• Lithofacies (Lower): Sands

• Thickness: 5 - 10 m

• Lower limit: Unconformity (Tanaka Formation)

------ 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
• Miyachi et al. (2001) Geology of the Osaka-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 130p. (in Japanese with English abstract 6p.)