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Hijiriyama Andesite Kato, 1980

Invalid synonym: Hijiriyamakabu Lava, Takaoyama Lava, Asakariyama Lava, Kusuriyama Lava, Akada Lava

• Type locality: Lake Suzuran - Fukumanji temple, Omi city, Higashichikuma county, Nagano prefecture
• Volcanic rocks
• early Pliocene (5.4 Ma, K-Ar)
• Correlation: Kumeji Pyroclastic Member

• Lithofacies: Calc-alkaline hypersthene andesite
• Lithofacies (Minor): Thleiite hypersthene augite andesite
• Lithofacies (Upper): Pyroxene andesite lava
• Lithofacies (Lower): Basaltic andesite volcanic breccia
• Lithofacies (Minor): Tuff breccia

• Thickness: 100 - 300 m
• Upper limit: Unconformity (Shinoyama Volcanics, Akada Formation, Haibara Formation, Yanagisawa Mudflow Deposit, Omachi Tephra)
• Lower limit: Unconformity (Susobana Formation, Komiji Formation, Kuwabara Volcanics, Ronji Formation)

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

• Distribution: Lake Suzuran - Fukumanji temple, Omi city, Higashichikuma county, Nagano pref.; Mount Takao, Chikuma city, Nagano pref.; Lake Inotairatameike - Mount Shinoyama - Kamiishikawa - Utabi - Lake Nashirazu, Shinonoi, Nagano city, Nagano pref.; Torisaka pass, Nagano city, Nagano pref.

• Kato and Akahane (1986) Geology of the Nagano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 120p. (in Japanese with English abstract 5p.)
• Kato and Sato (1983) Geology of the Shinano-Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 7p.)
• Kato (1980) Geology of the Sakaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)