[ Top ] [ Japanese ]
Poronai Formation Yabe, 1901
- Type locality: Poronai creek, Ikushunbetsu river, Mikasa city, Hokkaido
- Coherent formation
- late Eocene (Calcareous nannofossils)
- Sedimentary facies: Marine
- Sedimentary facies: Continental shelf
- Sedimentary facies: Transgressive deposit
- Depth of water: Shallow - Upper bathyal (Foraminifera)
- Lithofacies: Siltstone
- Lithofacies (Minor): Tuff
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kamihoronai, Atsuma city, Yufutsu county, Hokkaido
- Takahashi et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.10, pp.565-578 DOI
- Hoyanagi et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.205-215 DOI