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U-Oki Tephra

Abbr.: U-Oki

• Tephra
• Pleistocene (10.0 ka, Ar-Ar; 10.7 ka, Lake Suigetsu core)

• Source: Ulleung-do island, Korea

• Distribution: east Chugoku region - Kanto region, Honshu island, Japan

• Okuno (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.41-53 DOI