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Madaraokogen Pyroclastic Rocks Yanagisawa et al., 2000

• Volcanic rocks
• middle Pleistocene
• Contemporaneous heterotopic facies: Arasehara Pyroclastic Rocks

• Lithofacies: Hypersthene augite andesite volcaniclastic rocks, Debris flow deposits

• Thickness: Several - 100 m
• Lower limit: Unconformity (Ogawa Formation)

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

• Distribution: east of Mount Madarao - Madarao-kogen - Lake Numaike, Iiyama 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.)