[ Top ] [ Japanese ]

Ohanabeyama Lava Hayakawa, 1985

• Type locality: Mount Ohanabe, Towada city, Aomori prefecture
• Pre-caldera volcano
• Volcanic rocks
• late Pleistocene (0.4 - 0.2 Ma; 0.19 Ma, K-Ar)

• Lithofacies: Olivine-bearing hypersthene augite lava
• Lithofacies: Block lava, Aa lava (Several sheets)

• Thickness: 200 m or thinner
• Thickness (A sheet): several - 10 m
• Upper limit: Unconformity (Aobunayama Pyroclastic Rocks and Lava, Towada-Chuseri Pyroclastic Fall Deposit)
• Lower limit: Unconformity (Nashikizawa Tuff Member)

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

• Distribution: Mount Ohanabe, 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.)