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CR Tephra

Abbr.: CR

• Type locality: Denoo, Tateyama city, Chiba prefecture
• Tephra
• Pliocene - Pleistocene
• Correlation: Hn-7

• Lithofacies (Upper): Scoria
• Lithofacies (Lower): Pumice, Vitreous volcanic ash

• Host: Higashinagata Formation
• Thickness (Upper): 30 cm
• Thickness (Lower): 20 cm

• Distribution: Denoo, Tateyama 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.)