Akagi volcano

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Akagi volcano

Volcanic rocks
Caldera volcano
middle - late Pleistocene (0.5 Ma - 30 ka)

Lithofacies: Andesite
Lithofacies (Minor): Dacite

Distribution (East-West): 20 km
Distribution (South-North): 30 km
Distribution (Caldera, East-West): ca. 2 km
Distribution (Caldera, South-North): ca. 4 km
Upper limit: Unconformity (Tazawa Formation)

Akagi volcano
[ Upper ]
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Mugikubo Lava
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Nirezawa Lava
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[ Lower ]

Akagi volcano
[ Upper ]
+__+__+__+__+_
Younger Stratovolcano
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Nashiki Debris Avalanche Deposit
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Older Stratovolcano
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[ Lower ]

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

Distribution: Gunma pref.

Ito et al. (2022) Geology of the Kiryu and Ashikaga District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)
Yamamoto (2016) Jour. Geol. Soc. Japan, vol.122, no.3, pp.109-126, DOI
Kawata and Ozawa (1955) Ashio, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 7p.)