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Enrei Volcanic Rocks Makimoto et al., 1996

Invalid synonym: Enrei Formation

A general term of pliocene - pleistocene volcanic rocks distributed in Suwa region - Utsukushigahara plateau.

• Volcanic rocks
• Pliocene - early Pleistocene (2.1, 1.6 - 0.8 Ma)

• Sedimentary facies: Terrestrial
• Sedimentary facies: Volcanic products
• Lithofacies: Dacite lava, Tuff breccia, Volcanic breccia
• Lithofacies (Minor): Pyroxene andesite lava, Hornblende andesite lava

• Thickness: 300 m
• Distribution: 300 km² or more
• Upper limit: Unconformity (Uyamasegi Lava)
• Lower limit: Unconformity (Takenoyu Volcanics Member, Takabe Member, Kumakubo Member, Karasawagawa Member, Ryoke Metamorphic Rocks, Sanbagawa Metamorphic Rocks)

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

• Distribution: Lake Suwa - Mount Kirigamine - Utsukushigahara plateau, Nagano pref.
• Distribution: Utsukushigahara, Matsumoto city, Nagano pref.; Ono, Tatsuno city, Kamiina county, Nagano pref.; Kattsuru, Shiojiri city, Nagano pref.

• Makino et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.249-260, DOI
• Mukai et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.8, pp.400-422 DOI
• Makimoto et al. (1996) Geology of the Takato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 6p.)
• Kawachi and Aramaki (1979) Geology of the Komoro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 2p.)
• Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)
• Katada and Isomi (1964) Shiojiri, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 52p. (in Japanese with English abstract 10p.)