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Yamamio explosion crater Isshiki, 1960

• Volcanic rocks
• Parasitic cone
• Holocene (between 20 ka - 9th century)

• Lithofacies: Tuff breccia, Volcanic breccia

• Distribution (Diameter, Crater): 250 m
• Distribution (Depth, Crater): ca. 30 m
• Thickness: 40 - 50 m

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

• Distribution: Lake Tairoike - Kokoma (or Kokomanokoshi), 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.)