Older stage

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Older stage

Type locality: Nagano prefecture
Volcanic rocks
early - middle Pleistocene (ca. 0.8 - 0.5 Ma)

Lithofacies: Hornblende-deficient andesite, Dacite

Older stage
[ Upper ]
~~~~~~~~~~~~~~
Gamaharayama Lava
~~~~~~~~~~~~~~
Norikurazawa Lava
~~~~~~~~~~~~~~
Hiedayama-Jobu Lava
~~~~~~~~~~~~~~
Hiedayama-Kabu Lava
~~~~~~~~~~~~~~
[ Lower ]

Shirouma-Oike volcano
[ Upper ]
+__+__+__+__+_
Younger stage
~~~~~~~~~~~~~~
Older stage
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nagano pref.

Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)