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Older Haruna Volcanic Fan Deposits

• Type locality: Kurosawa river, Irisawa, Shibukawa city, Gunma prefecture
• Type locality: Nagai river, Gonda, Kurabuchi town, Takasaki city, Gunma prefecture
• Volcanic rocks
• middle Pleistocene
• Contemporaneous heterotopic facies, Interfingered: Older Haruna Volcanic Products

• Sedimentary facies: Terrestrial
• Sedimentary facies: Volcanic fan deposit
• Sedimentary facies: Pyroclastic flow deposit, Debris flow deposit
• Lithofacies: Tholeiite
• Lithofacies: Gravels, Pumiceous - scoriaceous pyroclastic flow deposit
• Lithofacies (Minor): Sands, Gravels

• Upper limit: Unconformity (Shirakawa Pyroclastic Flow Depoist, Jinba Debris Avalanche Deposit, Lower Agatsuma Loam, Miyukida Fan Deposit)
• Lower limit: Interfingered (Hagiu Formation), Unconformity (Akima Formation, Aimagawa Formation, Kogura Formation, Kanpo Volcanic Rocks)

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

• Distribution: Kurosawa river, Irisawa, Shibukawa city, Gunma pref.; Nagai river, Gonda, Kurabuchi town, Takasaki 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.)