Sessho Lava

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Sessho Lava

Volcanic rocks
Holocene (4.9 ka, ¹⁴C)

Lithofacies: Quartz-bearing two-pyroxene andesite lava

Source: summit of Mount Motoshirane

3rd stage
[ Upper ]
+__+__+__+__+_
Shirane pyroclastic cone
~~~~~~~~~~~~~~
Yumi-ike maar
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Ainomine pyroclastic cone
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Motoshirane pyroclastic cone
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Sessho Lava
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Motoshirane Lava
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Kumakura Pumice Bed
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Kagusa Lava
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Heibeike Lava
~~~~~~~~~~~~~~
[ Lower ]

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

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

Distribution: Kusatsu hot spring, Kusatsu city, Agatsuma county, Gunma pref.; Ishizu station, Kusatsu city, Agatsuma county, Gunma pref.

Terada (2018) Jour. Geol. Soc. Japan, vol.124, no.4, pp.251-270 DOI
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.)