Shirokurayama Mudstone Member

[ Top ] [ Japanese ]

Shirokurayama Mudstone Member Sumi and Nozawa, 1973

Submarine volcano in a rift zone
Coherent formation
Miocene

Lithofacies: Tuffaceous mudstone, Andesite lapilli tuff, Tuffaceous sandstone
Lithofacies (Minor): Tuff breccia

Thickness: ca. 20 - 40 m
Upper limit: Conformity (Matsukura Tuff Breccia Member)
Lower limit: Conformity (Shohayatsukigawa Conglomerate Member)

Iwaine Formation
[ Upper ]
~~~~~~~~~~~~~~
Matsukura Tuff Breccia Member
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Shirokurayama Mudstone Member
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Shohayatsukigawa Conglomerate Member
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[ Lower ]

Yatsuo Group (Toyama city, Toyama pref.)
[ Upper ]
~~~~~~~~~~~~~~
Higashibessho Formation
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Kurosedani Formation
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Iozen Formation
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Iwaine Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Kohayatsukigawa river - Mount Shirakurayama - Matsukura, Kamiichi city, Nakaniikawa county, Toyama pref.

Sumi and Nozawa (1973) Geology of the Uozu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 104p. (in Japanese with English abstract 5p.)