Nakatsukyo Volcanic Breccia Member

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Nakatsukyo Volcanic Breccia Member

Volcanic rocks
Trough-fill deposit at the collision boundary between Oceanic arc of Paleo-Izu-Bonin arc (Ocean crust) and Honshu arc (Island arc)
late Miocene
Interfingered: Junreitoge Conglomerate and Sandstone Member

Sedimentary facies: Marine
Lithofacies: Volcanic breccia

Nakatsukyo Formation
[ Upper ]
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Nakatsukyo Tuff Member
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Ichido Mudstone and Sandstone Member
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Junreitoge Conglomerate and Sandstone Member
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Nakatsukyo Volcanic Breccia Member
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[ Lower ]

Aikawa Group
[ Upper ]
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Sekirozan Formation
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Nakatsukyo Formation
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Funazawa Formation
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Miyagase Formation
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[ Lower ]

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

Distribution: 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.)