Jigokudani Lava

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Jigokudani Lava

Volcanic rocks
Pleistocene

Lithofacies: Hypersthene augite andesite lava

Source: Jigokudani valley

Younger period (Mount Shimagare - Mount Tsumeta)
[ Upper ]
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Jigokudani Lava
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Shimagareyamaseiho Lava
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Maruyamahokuho Lava
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Tateshinakogen Lava
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Tsumetayama Lava
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Tsumetayama obsidian
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[ Lower ]

Yatsugatake volcano
[ Upper ]
+__+__+__+__+_
Younger period
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Older period
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[ Lower ]

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

Distribution: Jigokudani valley, Sakuho city, Minamisaku county, Nagano pref.

Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)