Yokoyama Andesite

[ Top ] [ Japanese ]

Yokoyama Andesite

Volcanic rocks
Miocene

Lithofacies: Olivine hornblende andesite lava

Lower limit: Unconformity (Tsuno Group, Hiroshima Granites)

Kammuriyama Volcanic Rocks
[ Upper ]
~~~~~~~~~~~~~~
Hirotakayama Andesite
--------------
Kammurikogen Basalt
--------------
Yokoyama Andesite
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Yokoyama, Hatsukaichi city, Hiroshima pref.

Takahashi et al. (1989) Geology of the Tsuda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 56p. (in Japanese with English abstract 4p.)