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Takayama Volcanics

Invalid synonym: Mushikura Lava

• Volcanic rocks
• early Pleistocene (0.84 Ma, K-Ar)

• Sedimentary facies: Terrestrial
• Lithofacies (Upper): Rhyolite, Pitchstone, Pyroxene andesitic lava
• Lithofacies (Upper, Minor): Tuff breccia
• Lithofacies (Lower): Tuff breccia
• Lithofacies (Minor): Basaltic lava, Dacitic lava

• Thickness (Lower): 150 m or thicker
• Thickness (A unit): 10 - tens of m
• Upper limit: Unconformity
• Lower limit: Unconformity

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

• Distribution: Mount Takamatsu, Wada, Nagawa city, Chiisagata county, Nagano pref.; Mount Mushikura, Kashiwabara, Chino city, Nagano pref.

• Makino et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.249-260, DOI
• Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)
• Sawamura and Owa (1953) Suwa, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 4p.)