Hirasawa Diatomaceous Mudstone Member

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Hirasawa Diatomaceous Mudstone Member

Siliceous rock-dominant facies. It is not admitted as a member now.

Type locality: Oga city, Akita prefecture
Coherent formation
middle - late Miocene
Contemporaneous heterotopic facies: Shinzan Diatomaceous Mudstone Member

Sedimentary facies: Marine
Lithofacies: Diatomaceous mudstone

Onnagawa Formation (Kamishinzan)
[ Upper ]
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Shinzan Diatomaceous Mudstone Member / Hirasawa Diatomaceous Mudstone Member
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[ Lower ]

Oga peninsula
[ Upper ]
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Onnagawa Formation
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Nishikurosawa Formation
~~~~~~~~~~~~~~
Daijima Formation
~~~~~~~~~~~~~~
Nomuragawa Formation
~~~~~~~~~~~~~~
Monzen Formation
~~~~~~~~~~~~~~
Akashima Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Oga city, Akita pref.

Kano et al. (2011) Geology of the Toga and Funakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)