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Kumado Pyroclastic Flow Deposit

Invalid synonym: Nn1 Pyroclastic Flow Deposit, Yoshigadaira Tuff

• Tephra
• Caldera-overflow pyroclastic deposit
• Pleistocene (1.51 Ma; 1.47 - 1.1 Ma, K-Ar; 1.1 Ma, FT)
• Correlation: Shirakawa-Kumado Tephra

• Lithofacies: Pyroclastic flow deposit
• Lithofacies: Orthopyroxene clinopyroxene dacite
• Lithofacies: Pumiceous tuff breccia, Lapilli tuff

• Source: Ono caldera
• Host: Nanaorezaka Formation, Sakaibayashi Formation
• Thickness: ca. 20 - 200 m

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

• Distribution: Itani river, Nishiaizu city, Yama county, Fukushima pref.; Numayama, Niitsuru - Miyagawa river, Aizumisato city, Onuma county, Fukushima pref.; Osawa, Shimogo city, Minamiaizu county, Fukushima pref.

• Suzuki (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.121-133 DOI
• Yamamoto et al. (2006) Geology of the Kitakata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 63p. (in Japanese with English abstract 5p.)
• Yamamoto (1999) Geology of the Tajima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 8p.)
• Yamamoto and Yoshioka (1992) Geology of the Wakamatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 5p.)