Younger Haruna volcano

[ Top ] [ Japanese ]

Younger Haruna volcano

Volcanic rocks
late Pleistocene - Holocene (ca. 50 - 0 ka)

Sedimentary facies: Terrestrial
Sedimentary facies: Haruna caldera-forming pyroclasti flow, Lava domes
Lithofacies: Calc-alkaline
Lithofacies: Hornblende-bearing andesite - dacite

Younger Haruna volcano
[ Upper ]
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Futatsudake Lava
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Hr-FP Tephra
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Hr-FA Tephra
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Younger Haruna Volcanic Fan Deposit
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Mizusawayama Lava / Mizusawayama Pyroclastic Flow Deposit and Talus Deposit
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Somayama Lava
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Jagatake Lava
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Harunafuji Lava
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Hr-HP Tephra
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[ Lower ]

Haruna volcano
[ Upper ]
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Younger Haruna volcano
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Older Haruna volcano
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[ Lower ]

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

Distribution: Mount Haruna, Gunma pref.

Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)