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Ibaraki Lavas Ota and Katada, 1955

• Volcanic rocks
• Middle Pleistocene (0.75 Ma, K-Ar)

• Lithofacies: Lava, Pyroclastic rocks
• Lithofacies: Olivine-bearing orthopyroxene-clinopyroxene basaltic andesite, Orthopyroxene-clinopyroxene basaltic andesite

• Upper limit: Unconformity (Azumaya Lavas)
• Lower limit: Unconformity

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

• Distribution: Mount Baraki - Mount Matoiwa, Tsumagoi city, Agatsuma county, Gunma pref.

• 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.)