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SK Tephra Moriya et al., 2008

Abbr.: SK

• Type locality: Shinjo basin, Yamagata prefecture
• Tephra
• Pleistocene (4.0 Ma, FT)

• Lithofacies: Silty tuff
• Sedimentary structures: Parallel stratification

• Thickness: 0.9 - 8 m
• Host: Sakekawa Formation

• Distribution: Shinjo basin, Yamagata pref.

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