[ Top ] [ Japanese ]
Yuridaira Formation
- Coherent formation
- Nishidaigo basin
- Miocene
- Sedimentary facies: Marine
- Sedimentary facies: Inner bay - Estuary
- Sedimentary facies (East): Fan delta (Apex)
- Sedimentary facies (East, Upper): Debris flow deposit
- Sedimentary facies (East, Lower): Channel - bar deposit
- Lithofacies (East, Upper, Main): Interbedded conglomerate and sandstone
- Lithofacies (East, Upper, Minor): Sandy siltstone
- Lithofacies (East, Lower): Tuffaceous sandstone
- Lithofacies (West, Lower, Main): Siltstone-dominant sandstone and siltstone
- Lithofacies (West, Lower, Minor): Conglomerate
- Sedimentary structures (East, Lower): Parallel stratification, Trough cross-stratification, Planar cross-stratification
- Sedimentary structures (West, Lower): Parallel stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Daigo city, Kuji county, Ibaraki pref.
- Fossils (Bivalves): Anadara (Hataiarca) cf. kakehataensis
- Amano et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.69-87 DOI