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Shirakawa Kachikata-U8 Tephra

Abbr.: Sr-Kc-U8

Synonym: U8

• Tephra
• Pleistocene (0.92 - 0.91 Ma)
• Correlation: SK020, Ob6a (Choshi, Chiba), Ny4J (southern Boso, Chiba), Kachikata Pyroclastic Flow Deposit (Fukushima)

• Lithofacies: Vitreous volcanic ash

• Source: Shirakawa, Fukushima pref., Japan
• Host: Umegase Formation
• Thickness: 9 cm

• 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
• Nanayama et al. (2016) Geology of the Mobara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)
• Nakajima and Watanabe (2005) Geology of the Futtsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 102p. (in Japanese with English abstract 8p.)