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Ng Tephra

Abbr.: Ng

• Type locality: Hokkaido
• Tephra
• late Pleistocene

• Lithofacies (Upper): Pyroclastic flow deposit
• Lithofacies (Middle): Volcanic ash fall deposit
• Lithofacies (Lower): Pumice fall deposit
• Lithofacies (Bottom): Base-surge deposit

• Source: Nigorikaa caldera
• Host: Stage II (Komagatake volcano)
• Upper limit: Unconformity (P3)
• Lower limit: Unconformity (P5, P4)

• Distribution: Mount Komagatake, Hokkaido; Shirakawa - Nashinokisawa creek, Mori city, Kayabe county, Hokkaido

• Yoshimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.7, pp.336-347 DOI