Naeba volcano

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Naeba volcano

Volcanic rocks
Stratovolcano
Pleistocene (ca. 0.3 Ma)

Lithofacies: Calc-alkaline
Lithofacies: Augite hypersthene andesite lava, Volcaniclastic rocks

Distribution (East-West): 9 km
Distribution (South-North): 19 km
Distribution: 132 km²
Lower limit: Unconformity (Nishitajiri Formation, Ketto Formation)

Naeba volcano
[ Upper ]
+__+__+__+__+_
4th stage products
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3rd stage products
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2nd stage products
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1st stage products
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Older Naeba volcanic products
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[ Lower ]

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

Distribution: Niigata pref.

Shimazu and Tateishi (1993) Geology of the Naebasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)
Chihara et al. (1981) Geology of the Echigo-Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 108p. (in Japanese with English abstract 8p.)