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Tamadare Formation Watanabe, 1920
- Deposition: middle Cambrinan (506.0 Ma, U-Pb, 507 Ma, SHRIMP)
- Metamorphism: Early - Late Cretaceous (118.0 - 96.0, K-Ar)
- Lithofacies: Hornblende gneiss
- Lithofacies (Minor): Biotite gneiss
- Lithofacies (Protolith): Diorite
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Tamadare fall, Higashi-Goto, Hitachi city, Ibaraki pref.
- Tagiri et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.6, pp.231-247, DOI
- Tagiri et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.1-20 DOI