Purple Tuff Breccia Member

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Purple Tuff Breccia Member

Volcanic rocks
early Miocene

Sedimentary facies: Terrestrial
Lithofacies: Andesitic tuff breccia, Welded tuff, Basalt lava

Thickness: 130 m or thicker
Upper limit: Conformity (Purple Propylite Member)
Lower limit: Unconformity

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

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

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

Distribution: Koyobi creek - Katakariishi 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.)