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BW Tephra

Abbr.: BW

• Type locality: Nanjo forest road, Tateyama city, Chiba prefecture
• Tephra
• Pliocene - Pleistocene

• Lithofacies (Upper): Scoria
• Lithofacies (Lower): Pumice

• Host: Hata Formation, Kamo Formation
• Thickness (Upper): 16 cm
• Thickness (Lower): 1.3 - 3 cm

• Distribution: Nanjo forest road, Tateyama city, Chiba pref.; Komatsu - Kawato, Chikura 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.)