Karasawa Tuff Member

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Karasawagawa Tuff Member

Volcanic rocks
Oceanic arc of Paleo-Izu-Bonin arc
Mountain flank deposits of submarine volcanos and volcanic islands on Tanzawa mass
Middle Miocene

Sedimentary facies: Marine
Lithofacies: Basalt pyroclastic rocks
Lithofacies (Minor): Dacite tuff, Mudstone

Karasawagawa Formation
[ Upper ]
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Karasawa Tuff Member
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Nunokawa Volcanic Breccia Member
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[ Lower ]

Oyama Subgroup
[ Upper ]
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Karasawagawa Formation
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Hondanigawa Formation
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[ Lower ]

Tanzawa Group
[ Upper ]
~~~~~~~-------
Susugaya Subgroup
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Oyama Subgroup
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Togatake Subgroup
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[ Lower ]

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

Distribution: Tanzawa mountains, Kanagawa pref.

Oka et al. (1979) Geology of the Fujisawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 5p.)