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Western Iratsu mass
- High P/T metamorphic rocks
- Metamorphism: Late Cretaceous (115.9 Ma, Lu-Hf)
- Tectonic blocks of sedimentary rocks originated from accretionary complexes.
- Metamorphic facies: Eclogite facies
- Lithofacies (Protolith): Rises in oceanic plates such as seamounts, oceanic plateau, and island arcs.
- Lithofacies (Protolith): Limestone, Pelitic rocks, Basic clastic rocks, Gabbro
- Lithofacies: Garnet-bearing mafic gneiss
- Lithofacies (Minor): Peridotite, Diopside-Hornblende amphibolite, Psammitic-pelitic gneiss, Siliceous geniss
- Distribution: 5.5 x 2.0 km2
- Upper limit: Thrust fault
- Lower limit: Thrust fault
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Higashiakaishi, Ehime pref.
- Aoya et al. (2013) Geology of the Niihama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 181p. (in Japanese with English abstract 3p.)
- Sakurai and Takasu (2009) Jour. Geol. Soc. Japan, vol.115, no.3, pp.101-121 DOI