Variegated Tuff Member

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Variegated Tuff Member

Volcanic rocks
early Miocene

Sedimentary facies: Terrestrial
Lithofacies (Upper): Interbedded lapilli tuff and tuff breccia, Tuff breccia
Lithofacies (Lower): Interbedded tuff/andesitic lapilli tuff and tuffaceous sandstone
Lithofacies (Lower, Minor): Andesitic tuff breccia

Thickness: 70 - 180 m
Lower limit: Conformity (Purple Propylite Member)

Gongenzaki Formation (Minmaya)
[ Upper ]
~~~~~~~~~~~~~~
Variegated Tuff Member
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Purple Propylite Member
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Purple Tuff Breccia Member
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[ Lower ]

Northern Tsugaru peninsula
[ Upper ]
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Nagane Formation
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Fuyube Formation
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Isomatsu Formation
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Gongenzaki Formation
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[ Lower ]

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

Distribution: Koyobi creek, Kodomari, Nakadomari city, Kitatsugaru county, Aomori pref.

Ota et al. (1957) Mimmaya, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 30p. (in Japanese with English abstract 5p.)