Harunafuji Lava

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Harunafuji Lava

Type locality: summit of Mount Harunafuji, Harunako town, Takasaki city, Gunma prefecture
Volcanic rocks
Harunafuji lava dome
late Pleistocene (between 50 ka and 29 ka)

Sedimentary facies: Terrestrial
Sedimentary facies: Lava dome, Talus deposit
Lithofacies: Calc-alkaline
Lithofacies: Orthopyroxene hornblende andesite lava, Breccia

Distribution (Diameter): ca. 1 km
Distribution (Height): 210 m
Volume: ca. 0.05 km³
Lower limit: Unconformity (Shirakawa Pyroclastic Flow Deposit)

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 / Mizusawayama Pyroclastic Flow Deposit and Talus Deposit
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Mizusawayama Lava
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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 Harunafuji, Harunako town, Takasaki city, 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.)