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Iwayama Tephra Wakita et al., 2013

• Tephra
• Pleistocene (1.9 Ma, FT)

• Lithofacies: Vitreous volcanic ash

• Thickness: ca. 25 cm
• Host: Otonoyama Formation

• Distribution: Iwayama, Ujitawara city, Tsuzuki county, Kyoto pref.

• Wakita et al. (2013) Geology of the Kyoto-Tonambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 124p. (in Japanese with English abstract 3p.)