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Penke Formation

• Coherent formation

• Lithofacies: Andesitic volcanic breccia, Rhyolitic tuff

• Upper limit: Unconformity (Panke Formation)
• Lower limit: Unknown

• Distribution: Hokkaido

• Narita et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.3, pp.131-145 DOI