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Nandaira Pyroclastic Flow Deposit

• Tephra
• Pleistocene

• Lithofacies: Hypersthene augite hornblende andesite pyroclastic rocks
• Lithofacies (Minor): Lava

• Thickness: ca. 20 - 30 m
• Upper limit: Unconformity (Tateshinayama Lava)
• Lower limit: Unconformity (Tarugasawa Lava)

• Distribution: Nandaira - Lake Akanuma - Lake Shirakaba - Suzuran pass, Tateshina city , Kitasaku county, Nagano pref.; Mount Shiroyama, Shironotaira, Kitayama, Chino city, Nagano pref.

• Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)