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Nagahama volcano Isshiki, 1982

Invalid synonym: Sawajiriwan Lava, Nagumiwan Lava

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

• Sedimentary facies: Lava dome
• Lithofacies: Cummingtonite-bearing rhyolite lava, Breccia, Tuff breccia

• Distribution (South - North): ca. 4 km
• Distribution (East - West): ca. 1.5 km
• Distribution (Height): 270 m or thicker
• Upper limit: Unconformity (Tenjosan volcano, Chichibuyama Pyroclastic Deposits, Nachisan volcano)

• Distribution: Maehama - Nagahama - Kayasuhama, 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.)