[ Top ] [ Japanese ]
Kubohara Sandstone Facies (Ujihara et al., 1992) Yamasaki et al., 2020
Invalid synonym: Kubohara Facies, Kubohara Formations
- Type locality: Nakanishi, Kubohara, Yamaoka town, Ena city, Gifu prefecture
- Coherent formation
- First Seto Inland Sea
- Sedimentary basin in island arc
- early Miocene, Burdigalian
- Contemporaneous heterotopic facies: Maki Siltstone Member
- Correlation: Akeyo Formation
- Sedimentary facies: Shallow marine, Brackish
- Sedimentary facies: Inner bay
- Depth of water: Tidal zone - ca. 10 m
- Lithofacies: Gravelly sandstone, Sandstone
- Lithofacies (Minor): Tuffaceous siltstone, Interbedded mudstone and sandstone
- Lithofacies (Basal): Gravelly sandstone, Conglomerate
- Sedimentary structures (Basal): Cross stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nakanishi, Kubohara, Yamaoka town, Ena city, Gifu pref.; Kamaya - Hara, Yamaoka town, Ena city, Gifu pref.
- Fossils (Shellfishes): Cyclina japonica, Phacosoma kawagensis, Vicarya yokoyamai
- Fossils (Plants): Liquidambar miosinica, Quercus miovariabilis, Quercus praegilva
- Yamasaki et al. (2020) Geology of the Akechi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 120p. (in Japanese with English abstract 5p.)