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Soramineyama Basalt Yamauchi et al., 2005

• Type locality: summit of Mount Soramineyama, Okinoshima city, Oki county, Shimane prefecture
• Volcanic rocks
• Pliocene (4.18 Ma, K-Ar)

• Lithofacies: Alkaline olivine basalt lava

• Thickness: ca.0 m
• Lower limit: Conformity (Mukogaoka Formation)

• Distribution: summit of Mount Soramineyama, Okinoshima city, Oki county, Shimane pref.

• Yamauchi et al. (2009) Geology of the Saigo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 118p. (in Japanese with English abstract 3p.)