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Tr 4 Tephra

Abbr.: Tr 4

• Tephra
• Pleistocene

• Lithofacies: Vitreous tephra

• Thickness: 10 cm
• Host: Tsurukawa Formation

• Distribution: Kamimiwa, Miwa town, Machida city, Tokyo

• 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.)