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Shirakawa-Kumado Tephra

Abbr.: Sr-Kmd

Invalid synonym Kanai Tephra, Kd20.5

• Tephra
• Pleistocene (1.54 - 1.50 Ma)
• Correlation: Kumado Pyroclastic Flow Deposit, Hk50 (Sanjo, Niigata)Kd-21.5 (Kazusa Group, Chiba)

• Source: Shirakawa, Fukushima pref., Japan
• Host: Kiwada Formation, Tsurukawa Formation

• Distribution: Boso peninsula, 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.)
• Tamura et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.23-39 DOI
• 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.)