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HO Tephra, Moriya et al., 2008

Abbr.: HO

• Type locality: Shinjo basin, Yamagata prefecture
• Tephra
• Pleistocene

• Lithofacies: Tuff (2 units)
• Lithofacies (Top of units): Accretionary lapilli

• Thickness: 5 m or thicker
• Host: Yamuke Formation

• Distribution: Shinjo basin, Yamagata pref.

• Moriya et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.1, pp.1-15 DOI