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IZ-FM Tephra

Abbr.: IZ-FM

• Tephra
• Pleistocene

• Lithofacies: Scoria

• Lower limit: Unconformity (IZ-FM)

• Distribution: Nagano pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)