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Hk-J3 Tephra Kudo et al., 2000, 2003a

Abbr.: Hk-J3

• Type locality: Jigoku pond, Sukayu, Aomori city, Aomori prefecture
• Holocene (cal AD 1289 - 1403, ¹⁴C)

• Sedimentary facies: Terrestrial
• Lithofacies: Volcanic ash

• Mode of eruption: Phreatic
• Source: Jigoku pond (Kita-Hakkoda volcanoes)
• Eruptive volume: 10² m³
• Thickness: 0.5 - 1.5 cm

• Distribution: Jigoku pond, Sukayu, Aomori city, Aomori pref.

• Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)