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Kawarayu Quartz and Granodiorite Porphyry
Plutonic rocks
Late Pliocene (3.3 - 2.7 Ma)
Distribution: Azuma, Gunma pref.
Nakamura et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.397-412,
DOI