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Shirasakatoge Siltstone Member (Okutsu, 1955) Kitamura et al., 1983
Invalid synonym: Shirasakatoge Formation
- Type locality: Shirasaka pass, Aoba ward - Taihaku ward, Sendai city, Miyagi prefecture
- Coherent formation
- late Miocene
- Sedimentary facies: Lacustrine
- Lithofacies: Tuffaceous siltstone, Pumice tuff, Tuff, Sandstone
- Sedimentary structures (Sandstone): Cross stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shirasaka pass, Aoba ward - Taihaku ward, Sendai city, Miyagi pref.; Neshiroishi, Izumi ward, Sendai city, Miyagi pref.
- Fossils (Lower Neshiroishi flora): Acer protodiabolicum, Acer subpictum, Alnus sp., Betula onbaraensis, Dryopteris sp., Fagus cf. palaeocrenata, Metasequoia sp., Paliurus cf. protonipponicus, Sorbus sp., Tilia sp., Wisteria sp.
- Kitamura et al. (1986) Geology of the Sendai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 134p. (in Japanese with English abstract 9p.)
- Kitamura et al. (1983) Geology of the Yoshioka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 50p. (in Japanese with English abstract 5p.)