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H 1 Tephra

Abbr.: H 1

Invalid synonym: Kajigaya Tuff

• Tephra
• Pleistocene

• Lithofacies: Vitreous volcanic ash, Pumice

• Thickness: 100 - 300 cm
• Host: Ozenji Formation, Kakio Formation, Koshiba Formation

• Distribution: Hoshikawa town, Hodogaya ward, Yokohama city, Kanagawa pref.; Komaoka town, Tsurumi ward, Yokohama city, Kanagawa pref.; Manpukuji, Aso ward, Kawasaki city, Kanagawa pref.; Kajigaya town, Sakae 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.)
• Mitsunashi and Kikuchi (1982) Geology of the Yokohama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 105p. (in Japanese with English abstract 4p.)