Futagomine Lava

[ Top ] [ Japanese ]

Futagomine Lava Kawachi, 1974

Type locality: Mount Futago, Saku city, Nagano prefecture
Volcanic rocks
Pleistocene (0.38 Ma, K-Ar)

Lithofacies: Clinopyroxene-bearing orthopyroxene hornblende dacite
Lithofacies: Lava, Tuff breccia

Lower limit: Fukinotaira Volcanic Rocks

Tateshina Volcanic Rocks
[ Upper ]
?--?--?--?--?-
Maetateshinayama Lava
?--?--?--?--?-
Futagomine Lava
?--?--?--?--?-
[ Lower ]

Northern Yatsugatake volcanoes (Tateshina)
[ Upper ]
+__+__+__+__+_
Tateshina Volcanic Rocks
~~~~~~~~~~~~~~
[ Lower ]

Yatsugatake volcanoes (North of Natsuzawa pass)
[ Upper ]
+__+__+__+__+_
Northern Yatsugatake volcanoes
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mount Futago, Saku city, Nagano pref.

Nishiki et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.5, pp.193-211 DOI
Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)