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Miyatsukayama volcano Isshiki, 1987

• Type locality: Mount Miyatsukayama, Niijima island, Niijima city, Tokyo
• Volcanic rocks
• Monogenetic volcano
• Pleistocene

• Sedimentary facies: Lava dome, Pyroclastic cone
• Lithofacies (Upper): Biotite rhyolite lava
• Lithofacies (Lower): Biotite rhyolite volcanic ash, Pyroclastic rocks

• Distribution (South - North): ca. 1.5 km
• Distribution (East - West): ca. 1.5 km
• Thickness (Upper): ca. 250 m
• Thickness (Lower): ca. 20 - 30 m
• Upper limit: Unconformity (Mukaiyama volcano)
• Lower limit: Unconformity (Akazakinomine volcano, Habushiiso volcano)

• Distribution: Mount Miyatsukayama - Heinotaira (Hiinteiro), Niijima island, Niijima city, Tokyo

• Isshiki (1987) Geology of the Nii Jima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 3p.)