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Roppoishi Lavas

• Volcanic rocks
• Middle Pleistocene (0.69 - 0.68 Ma)

• Lithofacies: Lava
• Lithofacies: Orthopyroxene-clinopyroxene dacite

• Upper limit: Unconformity
• Lower limit: Unconformity

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

• Distribution: 1,992 m above sea level, north of Mount Neko, Suzaka city, Nagano pref.; Sugadaira - Mount Hashigoyama, Suzaka city, Nagano pref.

• Takeshita et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.233-248, DOI
• Nishiki et al. (2014) Jour. Geol. Soc. Japan, vol.120, no.3, pp.89-103 DOI
• Ota and Katada (1955) Suzaka, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 6p.)