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Gunkanyama Lava

• Volcanic rocks
• Pleistocene (0.58 Ma)

• Lithofacies: Lava

• Upper limit: Unconformity? (Tokachimitsumata Formation)
• Lower limit: Unconformity? (Tokachimitsumata Pyroclastic Flow Deposit)

• Distribution: Tokachimitsumata basin, Kamishihoro city, Kato county, Hokkaido

• Ishii et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.7, pp.348-365 DOI