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Katamachi Sand Bed Takada Plain Research Group, 1965

Invalid synonym: Older Sand Dune

• Type locality: Nagamine pond, Nagamine, Yoshikawa ward, Joetsu city, Niigata prefecture
• Coherent formation
• Pleistocene - Holocene (6,200 yBP, ¹⁴C)
• Correlation: Banjin Sand

• Sedimentary facies: Terrestrial
• Lithofacies: Sands
• Sedimentary structures (Lower): Parallel stratification

• Thickness: 50 - 80 m
• Distribution (Length): ca. 20 km
• Distribution (Width): ca. 3 km in maximum
• Upper limit: Unconformity (Younger Sand Dune)
• Lower limit: Conformity (Middle Terrace Deposit), Conformity, partly unconformity (Hirayama Formation)

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

• Distribution: Nagamine pond, Nagamine, Yoshikawa ward, Joetsu city, Niigata pref.; Naoetsu, Joetsu city, Niigata pref.; Kakizaki, Kakizaki ward, Joetsu city, Niigata pref.; Ogata ward, Joetsu city, Niigata pref.
• Fossils: Trace fossils (Plant roots)
• Tephra: On-Kt

• 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.)