Akakuradake Pyroclastic Rocks

Type locality: Aomori prefecture
Post-caldera volcanoes
Volcanic rocks
Pleistocene (ca. 0.3 - 0.0 Ma; 0.24, 0.14, 0.03 Ma, K-Ar)

Lithofacies: Quartz olivine augite hypersthene andesite, Olivine augite hypersthene andesite
Lithofacies: Agglutinate, Pyroclastic fall deposit

Mode of eruption: Vulcanian, Phreatic explosion, Phreatomagmatic
Thickness: ca. 900 m

Kita-Hakkoda volcanoes
[ Upper ]
~~~~~~~~~~~~~~
Odake Lava / Odake Pyroclastic Rocks
~~~~~~~~~~~~~~
Idodake Lava / Idodake Pyroclastic Rocks
'''''''/,,,,,,
Akakuradake Lava / Akakuradake Pyroclastic Rocks
~~~~~~~~~~~~~~
Kodake Lava
~~~~~~~~~~~~~~
Iodake Lava
~~~~~~~~~~~~~~
Sennintai Lava and Pyroclastic Rocks
~~~~~~~~~~~~~~
Tamoyachidake Lava
~~~~~~~~~~~~~~
Takadaotake Lava and Pyroclastic Rocks
~~~~~~~~~~~~~~
Hinadake Lava and Pyroclastic Rocks
~~~~~~~~~~~~~~
Tashirotai Lacustrine Formation
~~~~~~~~~~~~~~
[ Lower ]

Hakkoda caldera
[ Upper ]
~~~~~~~~~~~~~~
Kita-Hakkoda volcanoes
~~~~~~~~~~~~~~
Minami-Hakkoda volcanoes
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Aomori pref.

Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)