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MK-KM Tephra
Abbr.: MK-KM
- Lithofacies: Volcanic ash
- Distribution: Shinano city, Kamiminochi county, 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.)