Imogawa Member

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Imogawa Member

Invalid synonym: Imogawa Tuff

Volcanic rocks
middle Miocene

Lithofacies: Rhyolite volcanic breccia, Tuff breccia, Lapilli tuff, Tuff
Lithofacies (Minor): Mudstone

Thickness: 0 - 650 m

Nanatani Formation
[ Upper ]
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Imogawa Member
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[ Lower ]

Niigata plain, Niigata pref.
[ Upper ]
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Nanatani Formation
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Otani Formation
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Tonoiri Formation
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Mikawa Formation
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[ Lower ]

Kamo, Niigata pref.
[ Upper ]
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Minamiimogawa Formation
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Nanatani Formation
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Otani Formation
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Tonoiri Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Niigata pref.

Kudo et al. (2011) Geology of the Kamo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 162p. (in Japanese with English abstract 4p.)