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Shimotaga volcano

Invalid synonym: Taga volcano

• Type locality: Yamabushi pass - Shimotaga, Atami city, Shizuoka prefecture
• Volcanic rocks
• Intermediate between Stratovolcano and Shield volcano
• Pleistocene (1.2 - 0.8 Ma, K-Ar)

• Sedimentary facies: Marine
• Lithofacies: Tholeiite
• Lithofacies: Olivine basalt, Olivine clinopyroxene basalt
• Lithofacies (Minor): Orthopyroxene clinopyroxene andesite
• Lithofacies (Upper): Aphyric basalt, Andesite lava
• Lithofacies (Lower): Scoriaceous tuff breccia
• Lithofacies (Lower, Minor): Scoria fall deposit, Basalt aa lava

• Source: northeastern side of the distribution
• Upper limit: Unconformity (Uomisaki volcano, Atami volcano, Ajiro volcano)
• Lower limit: Unconformity (Tanna Tunnel Andesite, Ohito Andesites, Jo Group, Shuzenji White Tuffs)

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

• Distribution: Yamabushi pass - Shimotaga, Atami city, Shizuoka pref.; Ukihashi, Izunokuni city, Shizuoka pref.; Ono, Izu city, Shizuoka pref.

• Oikawa and Ishizuka (2011) Geology of the Atami District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 61p. (in Japanese with English abstract 3p.)
• Sawamura (1955) Shuzenji, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 47p. (in Japanese with English abstract 4p.)