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Kusatsu Formation
- Coherent formation
- Pliocene (1.8 - 1.4 Ma)
- Sedimentary facies: Terrestrial
- Sedimentary facies: Fluvial
- Lithofacies: Gravels, Interbedded gravel and mud
- Upper limit: Conformity
- Lower limit: Conformity
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shiga pref.
- Fossils (Plants): Alnus japonica, Betula maximowicziana, Cunninghamia sp., Fagus cf. microcarpa, Glyptostrobus pensilis, Hemiptelea mikii, Metasequoia disticha, Metasequoia glyptostroboides, Menyanthes trifoliata, Picea sp., Picea koribai, Pinus thunbergii, Pseudotsuga subrotunda, Pterocarya rhoifolia, Styrax japonica, Thuja sp.
- Tephra: Gokenjaya Tuff Bed, Kiryu Tuff Bed
- Satoguchi et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.70-78 DOI