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Yt-Pm4 Tephra

Abbr.: Yt-Pm4

Invalid synonym: Pm4

• Tephra
• Pleistocene (ca 40 ka)

• Lithofacies: Scoria

• Source: Mount Kitayokodake of Yatsugatake volcano

• Distribution: Nagano pref.

• Makimoto et al. (1996) Geology of the Takato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 6p.)