Ijiri caldera

[ Top ] [ Japanese ]

Ijiri caldera

Volcanic rocks
Caldera fill deposits
early Miocene

Sedimentary facies: Terrestrial, Marine
Lithofacies: Dacite lapilli tuff, Tuff

Distribution (Diameter): 5 - 7 km
Lower limit: Abut unconformity (Fube Granite, Neu Granite)

Hata Formation
[ Upper ]
~~~~~~~~~~~~~~
Yonago caldera
~~~~~~~~~~~~~~
Ijiri caldera
~~~~~~~~~~~~~~
[ Lower ]

southern Izumo, Shimane pref.
[ Upper ]
--------------
Jinzai Formation
--------------
Hikawa Formation
--------------
Fujina Formation
-------~~~~~~~
Omori Formation
~~~~~~~~~~~~~~
Kuri Formation
'''''''/,,,,,,
Kawai Formation
~~~~~~~~~~~~~~
Hata Formation
~~~~~~~~~~~~~~
Sada Formation
--------------
[ Lower ]

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

Distribution: Nishimori - Uzuki - Misaka - Fukutomi - Kirikui, Yasugi city, Shimane pref.

Kano et al. (2025) Geology of the Yonago District (2nd Ed.), Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 84p. (in Japanese with English abstract 4p.)