Oshoro Formation

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Oshoro Formation

Type locality: Oshoro peninsula, Yoichi city, Hokkaido
Volcanic rocks
Miocene (11 - 6 Ma)
Correlation: Otaru Formation

Sedimentary facies: Marine
Lithofacies: Basaltic - andesitic submarine lava, Basaltic - andesitic hyaloclastite

Otaru, Hokkaido
[ Upper ]
?--?--?--?--?-
Terrestrial andesite lava, 5 - 4 Ma
?--?--?--?--?-
Shioya Formation
?--?--?--?--?-
Oshoro Formation
?--?--?--?--?-
Takashima Formation / Hariusu Formation
?--?--?--?--?-
Kayashiba Formation
?--?--?--?--?-
Akaiwa Formation
?--?--?--?--?-
Otarunaigawa Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Oshoro peninsula, Yoichi city, Hokkaido

Nishina et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.5, pp.387-402 DOI