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Arasehara Pyroclastic Rocks (Hayatsu, 1985) Akahane et al., 1992

Invalid synonym: Nanamagari Pyroclastic Flow Deposit

• Type locality: Dobashi, Shinano city, Kamiminochi county, Nagano prefecture
• Volcanic rocks
• middle Pleistocene
• Contemporaneous heterotopic facies: Madaraokogen Pyroclastic Rocks

• Lithofacies: Hypersthene augite andesite pyroclastic rocks

• Thickness: 50 - 100 m
• Upper limit: Unconformity (Madaraojobu Lava, Okemi Tephra)

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

• Distribution: Dobashi - Mount Odaira, Shinano city, Kamiminochi county, Nagano pref.; Wakui, Nakano city, Nagano pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)
• Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)