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J9 Tephra Tokuhashi and Endo, 1984
Abbr.: J9
- Lithofacies (Upper): Pumice
- Lithofacies (Lower): Pumice, Scoria
- Sedimentary structures: Reversed graded bedding
- Host: Jizodo Formation
- Thickness (Upper): ca. 10 cm
- Thickness (Lower): ca. 10 cm
- Distribution: Chiba pref.
- Tokuhashi and Endo (1984) Geology of the Anesaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 6p.)