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Akakura Pyroclastic Flow Deposit Hayatsu, 1985

• Type locality: Tsubame hot spring - Shinakakura hot spring, Myoko city, Niigata prefecture
• Volcanic rocks
• Jomon period, Holocene (5,880 yBP, ¹⁴C)

• Lithofacies: Pyroclastic flow deposit (2 flow units)
• Lithofacies (Minor): Wood fragments

• Source: Myoko volcano
• Thickness: ca. 1 - 10 m or thicker
• Distribution: ca. 70 km²
• Upper limit: Unconformity (Otagirigawa Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Sekikawa Debris Avalanche Deposit)

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

• Distribution: Tsubame hot spring - Shinakakura hot spring, Myoko city, Niigata pref.; Sekikawa 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.)