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Koneyama Formation Gunma Geological Map Compilation Committee, 1999

• Type locality: Mount Koneyama, Matsuida town, Annaka city, Gunma prefecture
• Volcanic rocks
• Stratovolcano
• early - middle Pleistocene
• Contemporaneous heterotopic facies: Hanamagari Formation

• Sedimentary facies: Terrestrial
• Sedimentary facies: Volcanic fan
• Lithofacies: Olivine-bearing orthopyroxene clinopyroxene andesite conglomerate

• Lower limit: Unconformity (Itahana Formation, Kirizumi Formation)
• Lower limit (Jizotoge Formation): Unconformity (Aimagawa Formation, Akima Formation)

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

• Distribution: Mount Koneyama - Tsuchishio, Matsuida town, Annaka city, Gunma pref.

• Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)