Wake caldera

Wake caldera Ishihara and Imaoka, 1999

Invalid synonym: Wake cauldron

It was defined as a double caldera but some researchers consider that the outer and inner caldera is different volcanos. The age of the inner and the outer caldera has a ca. 3 Myr difference.

Volcanic rocks
Late Cretaceous

Sedimentary facies: Terrestrial
Sedimentary facies: Double caldera structure

Distribution (Inner, Diameter): 15 km
Distribution (Outer, Diameter): 15 x 23 km

Wake caldera
[ Inner ]
~~~~~~~~~~~~~~
Wake Formation
~~~~~~~~~~~~~~
Hinase Formation
~~~~~~~~~~~~~~
[ Outer ]

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

Distribution: Hinase - Sogotao pass, Hinase town, Bizen city, Okayama pref.

Sato et al. (2022) Geology of the Wake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 106p. (in Japanese with English abstract 4p.)
Sato et al. (2016) Geology of the Banshu-Ako District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 68p. (in Japanese with English abstract 3p.)