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Mengameyama Basalt Matsuura, 1990

• Type locality: Yokotani - Okamibuchi, Miyoshi city, Hiroshima prefecture
• Volcanic rocks
• Pliocene (1.8 Ma, K-Ar)
• Interfingered: Kotachi Gravel Bed

• Lithofacies: Alkaline olivine basalt lava (more than 6 flow units), Spatter tuff, Scoria tuff

• Source: Summit of Mount Mengameyama
• Distribution (East - West): ca. 4 km
• Distribution (South - North): ca. 7 km
• Lower limit: Unconformity

• Distribution: Mount Mengameyama, Miyoshi city, Hiroshima pref. - Iinan city, Iishi county, Shimane pref.; Yokotani - Okamibuchi, Miyoshi city, Hiroshima pref.

• Matsuura (1990) Geology of the Akana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 5p.)