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Kurohana Basalt (Suzuki et al., 1983) Matsuura, 1997

• Volcanic rocks
• Miocene (8.4 Ma, K-Ar)
• Intruded in: Ojizo Granite

• Sedimentary facies: Volcanic neck, Dikes, Pyroclastic cone
• Lithofacies: Augite olivine basalt pyroclastic rocks

• Distribution (East - West): ca. 150 m
• Distribution (South - North): ca. 80 m
• Distribution (Dike, Width): ca. 30 cm

• Distribution: Kuroshima island, Kamikamagarishima island, Kure city, Hiroshima pref.

• Matsuura (1997) Geology of the Kurahashi Jima and Hashira Jima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 53p. (in Japanese with English abstract 4p.)