Byobudake Pyroclastic Rocks

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Byobudake Pyroclastic Rocks

Volcanic rocks
Holocene (ca. 9 ka)
Correlation: Nr-Kr

Lithofacies: Hornblende hypersthene augite andesite welded pyroclastic rocks, Scoria agglomerate
Structures: Columnar joint

Thickness: ca. 10 m
Volume: less than 0.004 km³

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: Mount Byobudake, Iwaidani, Nyukawa town, Takayama city, Gifu pref.; Mount Dainichidake - Mount Asahidake, Takane 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.)