Toyabasan Lava

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Toyabasan Lava Shimada, 1964

Type locality: summit of Mount Toyaba, Takayama city - Obuse city, Kamitakai county, Nagano prefecture
Volcanic rocks
Pliocene

Lithofacies: Andesite lava

Thickness: ca. 50 m
Lower limit: Unconformity (Upper Karitasan Lava)

Karitasan Volcanic Rocks
[ Upper ]
~~~~~~~~~~~~~~
Asahiyama Lava
~~~~~~~~~~~~~~
Iizunayama Lava
~~~~~~~~~~~~~~
Toyabasan Lava
~~~~~~~~~~~~~~
Upper Karitasan Lava
~~~~~~~~~~~~~~
Middle Karitasan Lava
~~~~~~~~~~~~~~
Lower Karitasan Lava
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: summit of Mount Toyaba, Takayama city - Obuse city, Kamitakai county, Nagano pref.; Sakurasawa, Nakano city, Nagao pref.

Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)