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Kobiwako Group
- Coherent formation
- Pliocene - Pleistocene (4.4 - ? Ma)
- Sedimentary facies: Terrestrial
- Upper limit: Conformity (Bottom of Lake Biwa)
- Lower limit: Unknown
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Hananoki hills - Ueno, Iga city, Mie pref.; Oyamada city, Mie pref.; Yasu river, Konan city - Minakuchi, Koka city, Shiga pref.; Soma river, Koka village, Koka city, Shiga pref.; Shide, Taga city, Inugami county, Shiga pref.; Echi river, Higashiomi city, Shiga pref.
- Fossils (Mammals): Elephants, Deers, Cows, Boars, Rabbits, Mice
- Fossils (Reptiles): Crocodiles, Turtles
- Fossils: Plants, Birds, Shellfishes
- Tephra: Kosaji Tuff Bed, Gokenjaya Tuff Bed
- Satoguchi (2015) Jour. Geol. Soc. Japan, vol.121, no.4, pp.125-139, DOI
- Satoguchi et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.70-78 DOI