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Younger Sand Dune I

Invalid synonym: Arahama Sand Dune I

• Type locality: Sazanami Gakuen, Matsunami, Kashiwazaki city, Niigata prefecture
• Coherent formation
• Younger sand dune deposit
• Holocene (6,000 - 4,500 yBP)
• Correlation: Coastal Sand Dune I-2 (Niigata Sand Dune), Coastal Sand Dune I-3 (Niigata Sand Dune), Coastal Sand Dune II (Niigata Sand Dune)

• Sedimentary facies: Coast-parallel dune ridges
• Lithofacies: Sands
• Sedimentary structures: Parallel stratification

• Upper limit: Unconformity (Younger Sand Dune II, Kashiwazaki Formation)
• Lower limit: Unconformity (Banjin Sand)

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

• Distribution: Arahama Sand Dune, Kashiwazaki city, Niigata pref.

• Kobayashi et al. (1995) Geology of the Kashiwazaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 102p. (in Japanese with English abstract 4p.)