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Um Tephra Oka et al., 1984

Abbr.: Um

• Tephra
• Pleistocene

• Lithofacies: Crystalline tuff

• Thickness: 8 - 10 cm
• Host: Kamihoshikawa Formation

• Distribution: Umanose - campus of Tokyo Institude of Technology, Nagatsuda town, Midori ward, Yokohama city, Kanagawa pref.

• Oka et al. (1984) Geology of the Tokyo-Seinambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 148p. (in Japanese with English abstract 7p.)