Gohyakuyama Andesite Member

[ Top ] [ Japanese ]

Gohyakuyama Andesite Member Tsuneyama et al., 1989

Type locality: Moriage - Mount Gohyaku, Nagaoka city, Niigata prefecture
Volcanic rocks
Miocene

Lithofacies: Volcanic breccia, Tuff breccia
Lithofacies (Minor): Hyaloclastite, Mudstone, Interbedded volcanic sandstone and mudstone

Thickness: 400 - 500 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
~~~~~~~~~~~~~~
Hanzogane Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Moriage - Mount Gohyaku - Mount Ohira, 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.)