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GP Tephra
Abbr.: GP
Invalid synonym: AK
- Type locality: boundary between Shirahama town - Chikura town, Minamiboso city, Chiba prefecture
- Tephra
- Pliocene
- Lithofacies: Tuffaceous sands
- Distribution: boundary between Shirahama town - Chikura town, Minamiboso city, Chiba pref.; Takiyama, Shirahama town, Minamiboso city, Chiba pref.
- Kawakami and Shishikura (2006) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 82p. (in Japanese with English abstract 5p.)