Yotsudake Lava

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Yotsudake Lava Nakano, 1984

Invalid synonym: Yotsudake Cetral Cone

Type locality: Hirayuotaki fall, Okuhidaonsengo, Takayama city, Gifu prefecture
Volcanic rocks
Lava dome
late Pleistocene (0.06 Ma, K-Ar)

Lithofacies: Olivine biotite-bearing hornblende augite hypersthene andesite lava

Source: in the vicinity of Mount Yotsudake
Thickness: 60 m or thicker
Volume: 0.26 km³
Lower limit: Unconformity (Eboshi Lava, Mino Belt)

Yotsudake volcano
[ Upper ]
~~~~~~~~~~~~~~
Yotsudake Lava
~~~~~~~~~~~~~~
[ Lower ]

Later stage
[ Upper ]
~~~~~~~~~~~~~~
Gongenike volcano
~~~~~~~~~~~~~~
Ebisu volcano
~~~~~~~~~~~~~~
Yotsudake volcano
~~~~~~~~~~~~~~
[ Lower ]

Norikura volcano
[ Younger ]
~~~~~~~~~~~~~~
Later stage
~~~~~~~~~~~~~~
Older stage
~~~~~~~~~~~~~~
[ Older ]

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

Distribution: Hirayuotaki fall - Otakigawa river, Okuhidaonsengo, Takayama city, Gifu pref.; Mount Yotsudake, Takayama city, Gifu pref.

Nakano et al. (1995) Geology of the Norikuradake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 139p. (in Japanese with English abstract 4p.)
Harayama (1990) Geology of the Kamikochi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 175p. (in Japanese with English abstract 11p.)