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Toberi Formation

• Volcanic rocks
• Miocene (16.9 Ma)

• Lithofacies (Upper): Andesite lava
• Lithofacies (Lower): Basalt lava, Basalt pyroclastic rocks

• Lower limit: Conformity (Toyokoro coal formation)

• Distribution: Toyokoro region, Hokkaido

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