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Main stratovolcano Isshiki, 1980
- Type locality: Mikurajima city, Tokyo
- Volcanic rocks
- Pleistocene - Holocene?
- Intruded by: Dykes (more than 165 dikes)
- Sedimentary facies: Lava flow, Explosion breccia, Mudflow deposit, Volcanic neck
- Lithofacies: Pigeonite series
- Lithofacies: Olivine basalt, Augite olivine basalt, Olivine pyroxene andesite, Pyroxene andesite
- Lithofacies: Aa lava, Scoria fall deposit, Scoria tuff, Tuff breccia, Volcanic breccia
- Eruptive volume: ca. 8.2 km3
- Thickness (A flow unit, Lava): Several m or thinner
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mikurajima city, Tokyo
- Isshiki (1980) Geology of the Mikurajima, Inambajima and Zenisu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 35p. (in Japanese with English abstract 3p.)