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Younger Sand Dune Takada Plain Research Group, 1965

• Type locality: Naoetsu seashore, Naoetsu, Joetsu city, Niigata prefecture
• Coherent formation
• Holocene
• Younger Sand Dune II: Holocene (Heian era or later)
• Younger Sand Dune I: Holocene (late Jomon era or earlier)

• Sedimentary facies: Terrestrial
• Lithofacies: Sands

• Thickness: 30 - 40 m
• Lower limit: Unconformity (Haranomachi Formation, Katamachi Sand Bed, Takada Formation)

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

• Distribution: Naoetsu seashore, Naoetsu, Joetsu city, Niigata pref.; Kuroi, Joetsu city, Niigata pref.; Kakizaki, Kakizaki ward, Joetsu city, Niigata pref.

• Takeuchi et al. (1996) Geology of the Kakizaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 48p. (in Japanese with English abstract 5p.)
• Akahane and Kato (1989) Geology of the Takada-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 3p.)