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Ako Lava Isshiki, 1960

• Type locality: Ako, Miyake city, Tokyo
• Volcanic rocks
• Holocene (AD1643?)

• Sedimentary facies: Marine, Terrestrial
• Sedimentary facies: Lava delta
• Lithofacies: Tholeiite series
• Lithofacies: Basalt lava

• Source: in the vicinity of Kuwanokitaira
• Distribution (Width): ca. 100 m
• Thickness: Several m or thinner
• Upper limit: Unconformity (Shinmio explosion crater)

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

• Distribution: Ako, Miyake city, Tokyo

• Isshiki (1960) Miyake-jima, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 5p.)