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Shibutami Tephra

Synonym: Shibutami Tuff Bed

• Tephra
• Pleistocene
• Correlation: Tamagawa Welded Tuff

• Lithofacies: Tuff

• Upper limit: Unconformity (Wakare Roam Formation)

• Distribution: Iwate pref.

• Itoh et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.4, pp.271-296 DOI
• Suto and Ishii (1987) Geology of the Shizukuishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 142p. (in Japanese with English abstract 5p.)