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Maekawa Mudflow Deposit Hayatsu, 1983

• Type locality: Left bank of Maekawa river, Tsuchikura - Iwakura, Itoigawa city, Niigata prefecture
• Coherent formation
• Holocene (3,160 - 2,830 yBP, ¹⁴C)

• Sedimentary facies: Fluvial
• Sedimentary facies: Mudflow deposit, Debris flow deposit
• Sedimentary facies (Minor): Pyroclastic flow deposit
• Lithofacies (Top): Sands, Gravels
• Lithofacies: Andesite volcanic breccia, Mud, Volcanic ash, Sands

• Thickness: 10 m or thicker
• Upper limit: Unconformity (Hayakawa Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Nodani Formation)

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

• Distribution: Tsuchikura - Iwakura, Itoigawa city, Niigata pref.

• Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)
• 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.)