[ Top ] [ Japanese ]

480m-yama volcano

• Type locality: 480 m peak at northwest of Izu-Oshima island, Oshima city, Tokyo
• Volcanic rocks
• Lateral volcano
• late Pleistocene

• Lithofacies: Low-alkaline tholeiite series
• Lithofacies: Pigeonite series
• Lithofacies: Olivine basalt, Pyroxene olivine basalt, Pyroxene basalt
• Lithofacies: Scoria, Volcanic bomb, Spatter

• Thickness: 10 m or thicker

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

• Distribution: 480 m peak at northwest of Izu-Oshima island, Oshima city, Tokyo

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