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Osawa volcano Isshiki, 1982

Invalid synonym: Osawa Lava Dome

• Type locality: Kozushima city, Tokyo
• Volcanic rocks
• Monogenetic volcano
• Pleistocene

• Sedimentary facies: Lava dome
• Lithofacies: Biotite rhyolite lava

• Distribution (Diameter): ca. 600 m
• Eruptive volume: 0.2 km³
• Thickness: ca. 100 m
• Upper limit: Unconformity (Tenjosan volcano, Takodoyama volcano)
• Lower limit: Unconformity (Matsuyamabana volcano)

• Distribution: Kozushima city, Tokyo

• Isshiki (1982) Geology of the Kozushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 3p.)