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Mpk Tephra

Abbr.: Mpk

• Tephra
• Pleistocene

• Lithofacies: Volcanic ash

• Host: Koikegawa Member

• Distribution: Niigata pref.

• Shimazu and Tateishi (1993) Geology of the Naebasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)