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Hotaka-Kd39 Tephra

Abbr.: Ho-Kd39

Synonym.: Kd39

• Tephra
• Pleistocene (1.76 Ma)
• Correlation: Kawakubo Tephra (Kakegawa, Shizuoka), Yazaki Tephra (Himi, Toyama), Ob1 (Choshi, Chiba), HT07 (southern Boso, Chiba), YK03 (southern Boso, Chiba), Hotaka Andesites, Nyukawa Pyroclastic Flow Deposit

• Source: Mount Hotaka, Nagano pref., Japan
• Host: Kiwada 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