Tuff cone

[ Top ] [ Japanese ]

Tuff cone Isshiki, 1959

Type locality: Mount Nishiyama, Hachijo city, Tokyo
Volcanic rocks
Stratovolcano
Holocene

Lithofacies: Tholeiite series
Lithofacies: Basalt tuff, Tuff breccia
Lithofacies (Minor): Volcanic conglomerate

Source: 2 craters
Mode of eruption: Phreatic

Nishiyama volcano
[ Upper ]
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Tuff cone / Scoria cones
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Main cone
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[ Lower ]

Hachijojima volcano
[ Upper ]
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Nishiyama volcano
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Higashiyama volcano
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Old volcanoes
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[ Lower ]

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

Distribution: Mount Kandoyama - Kaminato, Hachijo city, Tokyo

Isshiki (1958) Hachijo-jima, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 58p. (in Japanese with English abstract 5p.)