Hanamagari Formation

Volcanic rocks
Stratovolcano
early - middle Pleistocene
Contemporaneous heterotopic facies: Koneyama Formation
Correlation: Kennomine Formation (1.04 - 0.9 Ma, K-Ar)

Lithofacies: Volcanic rocks

Hanamagari volcano
[ Upper ]
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Hanamagari Formation / Koneyama Formation
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Jizotoge Formation
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[ Lower ]

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

Distribution: 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.)