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HS C Tephra (Niitsuma, 1976) Satoguchi, 1995

Abbr.: HS C

Invalid synonym: Oh7

• Type locality: Katsuura, Katsuura city, Chiba prefecture
• Tephra
• Pleistocene (2.0 Ma)
• Correlation: Tmg-R4, Ysg5, Kurasawayama Welded Tuff

• Lithofacies: Tuff

• Source: Pre-Akitayakeyama caldera, Akita pref., Japan
• Host: Ohara Formation
• Thickness: 5 cm

• Distribution: Katsuura, Katsuura city, Chiba pref.; Kamifuse, Isumi city, 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.)
• Ueki and Sakai (2007) Geology of the Ome District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 189p. (in Japanese with English abstract 5p.)