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PK Tephra
Abbr.: PK
Invalid synonym: Pk
- Lithofacies: Vitreous tephra
- Distribution: Manpukuji, Aso ward, Kawasaki city, Kanagawa pref.; Mamedo town, Kohoku ward, Yokohama city, Kanagawa pref.
- Ueki et al. (2013) Geology of the Hachioji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 137p. (in Japanese with English abstract 6p.)