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Tamagawa-R4 Tephra

Abbr.: Tmg-R4

• Tephra
• Pleistocene (2.0 Ma)
• Correlation: Tamagawa Welded Tuff, HS C, Ysg5, Kg1c (Choshi, Chiba), Sig, Kurasawayama Welded Tuff

• Lithofacies: Tuff

• Source: Pre-Akitayakeyama caldera, Akita pref., Japan
• Host: Ohara Formation, Sayama Formation

• Distribution: Akita pref.

• Tamura et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.23-39 DOI
• 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.)