[ Top ] [ Japanese ]

Komagamine Pyroclastic Rocks Takarada and Muraoka, 2004

• Type locality: Mount Komagamine, Towada city, Aomori prefecture
• Pre-caldera volcanoes
• Volcanic rocks
• Pleistocene (0.32 Ma, K-Ar)

• Lithofacies: Quartz augite hypersthene dacite
• Lithofacies: Blocks, Volcanic lapilli, Sands

• Thickness: ca.5 - 10 m
• Lower limit: Unconformity (Minami-Hakkoda 1st-stage Lava and Pyroclastic Rocks, Minami-Hakkoda 2nd-stage Lava and Pyroclastic Rocks)

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

• Distribution: Mount Komagamine, Towada city, 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.)