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Ryukoma intrusion
Invalid synonym: Ryukoma Granite
- Plutonic rocks
- Paleocene (60.5 Ma, Rb-Sr)
- Lithofacies: I-type magnetite series
- Lithofacies: Biotite granodiorite (deficient in hornblende)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Okuizumo city, Shimane pref.
- Iwata et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.3, pp.190-204 DOI