Komenashi Lava

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Komenashi Lava

Volcanic rocks
Pleistocene

Lithofacies: Two-pyroxene andesite

Lower limit: Unconformity (Matsuozawa Lava)

Matsuozawa volcano
[ Upper ]
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Yumiike Lava
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Komenashi Lava
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Udogasawa Lava
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Yahazudaira Lava
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Aoba Lava
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Matsuozawa Lava
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Yatoko Lava
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Shirane Tuff Breccia
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[ Lower ]

1st stage
[ Upper ]
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Matsuozawa volcano
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[ Lower ]

Kusatsu-Shirane volcano
[ Upper ]
+__+__+__+__+_
3rd stage
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2nd stage
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1st stage
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[ Lower ]

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

Distribution: Agatsuma mine, Tsumagoi city, Agatsuma county, Gunma pref.
Deposits (Sulphur): Agatsuma mine, Ishizu mine

Ota (1957) Kusatsu, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 8p.)