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Usuki Lava Isshiki, 1960

• Type locality: Usuki, Miyake city, Tokyo
• Volcanic rocks
• Holocene (AD1763 - 1969?)

• Lithofacies: Tholeiite series
• Lithofacies: Basalt lava, Scoria, Volcanic bomb
• Lithofacies (Minor): Driblet
• Paleocurrent: to South-southwest

• Distribution (Diameter, Crater): ca. 50 m
• Distribution (Depth, Crater): 10 - 15 m
• Distribution (Width): 1.5 km
• Thickness: Several m or thinner
• Lower limit: Unconformity (Shinmio explosion crater)

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

• Distribution: Usuki, 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.)