[ Top ] [ Japanese ]
Shimokurosawa Formation
- Type locality: Iwai river, Shimokurosawa, Ichinoseki city, Iwate prefecture
- Coherent formation
- middle Miocene
- Sedimentary facies: Marine
- Lithofacies: Tuffaceous sandstone, Sandy siltstone
- Lithofacies (Minor): Pumice tuff, Tuff breccia
- Shimokurosawa Formation
- [ Upper ]
- --------------
- Tsukumo Sandstone Member
- -------'''/,,
- Main part
- --------------
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shimokurosawa, Ichinoseki city, Iwate pref.
- Fossils: Mammalia (Desmostylus sp.)
- Fossils (Shellfishes): Cultellus izumoensis, Lucinoma acutilineata, Macoma optiva, Solen sp.
- Tsuchiya et al. (1997) Geology of the Iwagasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 96p. (in Japanese with English abstract 4p.)
- Matsuno (1967) Geology of the Wakayanagi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 24p. (in Japanese with English abstract 5p.)