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Oyama Pyroclastic Rocks Member

• Type locality: Ikudo power station, Ikudo, Oyama city, Sunto county, Shizuoka prefecture
• Coherent formation
• Trough-fill sediments between the plate of Honshu side and the Izu block,, an island arc - island arc collision zone
• early Pleistocene (0.71, 0.62 Ma, K-Ar)

• Sedimentary facies: Pyroclastic flow deposit
• Lithofacies: Orthopyroxene-biotite-hornblende dacite
• Lithofacies: Pyroclastic rocks

• Source: Hata Vent Breccia
• Thickness: 3.2 - 500 m

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

• Distribution: Ikudo power station, Ikudo, Oyama city, Sunto county, Shizuoka pref.

• Odawara et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.135-152 DOI