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Sekikawa Debris Avalanche Deposits Hayatsu, 1985

Invalid synonym: Haradori Mudflow Hills

• Type locality: Tsubame hot spring - Araiminami junior high school, Atosaka, Myoko city, Niigata prefecture
• Volcanic rocks
• Pyroclastic cones
• late Pleistocene (19,600, 19,300 yBP, ¹⁴C)

• Lithofacies: Debris avalanche deposits

• Source: Myoko volcano
• Thickness: 8 - 150 m
• Upper limit: Unconformity (Akakura Pyroclastic Flow Deposit)

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

• Distribution: Tsubame hot spring - Araiminami junior high school, Atosaka, Myoko city, Niigata pref.; Seki river, Haradori, Myoko city, Niigata pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)