Nokogiriyama Dacite Member

[ Top ] [ Japanese ]

Nokogiriyama Dacite Member Tsuneyama et al., 1989

Type locality: Suyoshi - Hanzogane, Nagaoka city, Niigata prefecture
Volcanic rocks
Miocene (8.98 Ma, FT)

Lithofacies: Dacite lava, Volcanic breccia, Lapilli tuff, Interbedded volcanic sandstone and mudstone, Mudstone

Thickness: A few dozen - 600 m or thicker

Sarukuradake Formation
[ Upper ]
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Nokogiriyama Dacite Member / Gohyakuyama Andesite Member
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[ Lower ]

Nagaoka region, Niigata pref.
[ Upper ]
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Sarukuradake Formation
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Hanzogane Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Suyoshi - Hanzogane - Mount Nokogiriyama - Hanatate pass, Mount Sarukura, Nagaoka city, Niigata pref.

Kobayashi et al. (1991) Geology of the Nagaoka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 132p. (in Japanese with English abstract 6p.)