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Kd28-2 Tephra
Abbr.: Kd28-2
- Distribution: Chiba pref.
- Utsunomiya and Ooi (2019) Geology of the Kazusa-Ohara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)