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Tpfl I Tephra

Abbr.: Tpfl I

• Volcanic rocks
• Pleistocene (132 ka, TL)

• Lithofacies: Pyroclastic surge deposit

• Source: Toya volcano
• Lower limit: Unconformity (Kaminagawa Formation, Osarugawa Tephra)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Iburi region, Hokkaido

• Ganzawa et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.9, pp.470-478 DOI