Older Haruna volcano

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Older Haruna volcano

Volcanic rocks
Stratovolcano
middle Pleistocene (ca. 0.5 - 0.24 Ma)

Sedimentary facies: Terrestrial
Lithofacies: Tholeiite
Lithofacies: Pyroxene andesite lava, Pyroclastic rocks

Distribution (Diameter): ca. 25 km
Lower limit: Unconformity (Kanpo Volcanic Rocks, Akima Formation, Aimagawa Formation, Garameki Formation)

Older Haruna volcano
[ Upper ]
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Older Haruna Volcanic Products / Older Haruna Volcanic Fan Deposits
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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.)