Upper Nihonmatsu Tuff

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Upper Nihonmatsu Tuff Fujii, 1966

Type locality: middle reaches of Kanagi river, Kanagi town, Goshogawara city, Aomori prefecture
Tephra
Pliocene
Correlation: Obirakiyama Pyroclastic Flow Deposit

Lithofacies: Acidic pumice tuff, Tuff breccia

Thickness: 100 - 200 m
Lower limit: Unconformity (Genpachimori Formation)

Misogasawa Formation (West of Tsugaru fault)
[ Upper ]
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Upper Nihonmatsu Tuff
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[ Lower ]

Isodayama Formation (East of Tsugaru fault)
[ Upper ]
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Upper Nihonmatsu Tuff
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Kanagigawa Member
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[ Lower ]

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

Distribution: Nakasato, Nakadomari city, Kitatsugaru county, Aomori pref.; Kanagi river, Kanagi town, Goshogawara city, Aomori pref.

Fujii (1981) Geology of the Aburakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 38p. (in Japanese with English abstract 3p.)
Fujii (1966) Kanagi, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 40p. (in Japanese with English abstract 4p.)