[ Top ] [ Japanese ]

Hashiruma volcano Isshiki, 1982

Invalid synonym: Hashiruma Lava

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

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

• Thickness: ca. 150 m
• Upper limit: Unconformity (Chichibuyama Pyroclastic Deposits)
• Lower limit: Unconformity (Chichibuyama Pyroclastic Deposits)

• Distribution: Tsuzukizawa - Hashirumakawara - Ushihana - Kannonura, 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.)