[ Top ] [ Japanese ]

Ikumo Caldera

Invalid synonym: Ikumo cauldron

• Asymmetric collapse caldera (piecemeal-type and trapdoor-type)
• Volcanic rocks
• Late Cretaceous

• Distribution (East-West): 11 km
• Distribution (South-North): 16 km

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

• Distribution: Yamaguchi pref.

• Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI