Hiragane Lava

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Hiragane Lava

Volcanic rocks
Pleistocene

Sedimentary facies: Valley-fill lava flow
Lithofacies: Augite hypersthene andesite lava

Thickness: ca. 50 m
Volume: 0.12 km³
Upper limit: Unconformity (Ebisu Lava)
Lower limit: Unconformity (Eboshi Lava)

Gongenike volcano
[ Upper ]
~~~~~~~~~~~~~~
Shinki Tephra
~~~~~~~~~~~~~~
Iwaidani Lava
~~~~~~~~~~~~~~
Byobudake Pyroclastic Rocks
~~~~~~~~~~~~~~
Kengamine Lava
~~~~~~~~~~~~~~
Hiragane Lava
~~~~~~~~~~~~~~
Danahigashidani Lava
~~~~~~~~~~~~~~
Kuraigahara 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: Iwaidani valley - Sawanouetani gawa river - Nubiki fall - Hiragane mine, Nyukawa town, 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.)
Yamada et al. (1985) Geology of the Takayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)