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Geiyo Volcanic Rocks Imoo and Matsuura, 2000

• Volcanic rocks
• late Miocene (8.0, 7.8 Ma, K-Ar)
• Intruded in: Okitomo Formation

• Sedimentary facies (Minor): Dikes
• Lithofacies: Olivine bronzite andesite tuff breccia, Lapilli tuff, Lapillistone

• Distribution: Okamurajima island - Shironotani valley, Imabari city, Ehime pref.; Okitomo - Kurohana, Kure city, Hiroshima pref.

• Matsuura (2001) Geology of the Mitsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 58p. (in Japanese with English abstract 4p.)