Shiroyama Lava

[ Top ] [ Japanese ]

Shiroyama Lava

Volcanic rocks
middle Pleistocene

Lithofacies: Two-pyroxene andesite lava

Thickness: A few dozen m
Lower limit: Unconformity (Tuff breccia)

Old stage (Somma)
~~~~~~~~~~~~~~
Yahazugasen Lava
~~~~~~~~~~~~~~
Katsutagasen Lava
~~~~~~~~~~~~~~
Senjosan Lava
~~~~~~~~~~~~~~
Shiroyama Lava
~~~~~~~~~~~~~~
Yoshiwara Lava
~~~~~~~~~~~~~~

Daisen volcano
[ Upper ]
+__+__+__+__+_
Young stage
~~~~~~~~~~~~~~
Old stage
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mount Karasugasen, Kotoura city, Tohaku county, Tottori pref.; Mitsukue, Kofu city, Hino county, Tottori pref.

Ota (1962) Akasaki & Daisen, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 37p. (in Japanese with English abstract 3p.)