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Pyroclastic Rock 10

• Volcanic rocks
• late Miocene

• Sedimentary facies (Upper): Pyroclastic flow deposits
• Sedimentary facies (Middle): Volcanic ash fall
• Sedimentary facies (Lower): Pyroclastic flow deposits
• Lithofacies (Upper): Lapilli tuff, Tuff breccia
• Lithofacies (Middle): Tuff
• Lithofacies (Lower): Lapilli tuff, Tuff breccia

• Host: Yokooyama Trachyte
• Thickness (Upper): ca. 20 - 50 m
• Thickness (Lower): ca. 20 - 50 m

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: 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.)