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Urakawa Lamprophyre

• Intrusive rocks
• Miocene (17.7 Ma, K-Ar)
• Intruded in: Upper Yezo Group

• Lithofacies: Phonolite, Phonotephrite

• Distribution: Urakawa region, Hokkaido

• Furukata et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.4, pp.199-218 DOI