1778 Lava

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1778 Lava

Volcanic rocks
Holocene (AD 1778)

Lithofacies: Orthopyroxene basalt lava

Y₁ Member
[ Upper ]
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1778 Lava
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Miharayama Scoria Cone
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[ Lower ]

Yuba Formation
[ Upper ]
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Y₁ Member
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Y₂ Member
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Y₃ Member
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Y₄ Member
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Y₅ Member
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Y₆ Member
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[ Lower ]

Post-caldera stage
[ Upper ]
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Yuba Formation
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Nomashi Formation
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[ Lower ]

Oshima volcano
[ Upper ]
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Post-caldera stage
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Syn-caldera stage
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Pre-caldera stage
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[ Lower ]

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

Distribution: Oshima city, Tokyo metropolis

Isshiki (1984) Geology of the Oshima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 133p. (in Japanese with English abstract 5p.)