Matsukura Tuff Breccia Member

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Matsukura Tuff Breccia Member Sumi and Nozawa, 1973

Type locality: Matsukura, Uozu city, Toyama prefecture
Submarine volcano in a rift zone
Volcanic rocks
Miocene

Lithofacies: Andesite tuff breccia
Lithofacies (Minor): Lapilli tuff, Pyroxene andesite lava, Tuffaceous mudstone

Thickness: ca. 50 - 200 m
Upper limit: Unconformity (Furukakuma Sandstone Member)
Lower limit: Conformity (Shirokurayama Mudstone Member, Shohayatsukigawa Conglomerate Member), Unconformity (Nirehara Formation)

Iwaine Formation
[ Upper ]
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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 ]
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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: Kamiichigawa river - Kohayatsukigawa river - Hayatsukigawa river, Kamiichi city, Nakaniikawa county, Toyama pref.; Kadokawa river, Uozu city, 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.)