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P4 Tephra
Abbr.: P4
- Type locality: Mount Komagatake, Hokkaido
- Tephra
- late Pleistocene (14.8 cal ka, 14C)
- Lithofacies: Pyroclastic flow deposit (Scoria)
- Mode of eruption: Plinian
- Eruptive volume: 0.05 km3 DRE or less
- Thickness: 3 m or thicker
- Upper limit: Unconformity (Ng)
- Stage II
- [ Upper ]
- ~~~~~~~~~~~~~~
- P3
- ~~~~~~~~~~~~~~
- P4
- ~~~~~~~~~~~~~~
- P5
- ~~~~~~~~~~~~~~
- P6
- ~~~~~~~~~~~~~~
- P7
- ~~~~~~~~~~~~~~
- Ko-h
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Komagatake, Hokkaido; Nashinokisawa creek, Mori city, Kayabe county, Hokkaido
- Yoshimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.7, pp.336-347 DOI
- Yoshimoto et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.81-92 DOI