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An1 Tephra Tokuhashi and Endo, 1984

Abbr.: An1

• Tephra
• Pleistocene
• Correlation: Hk-KmP1

• Lithofacies: Pumice
• Lithofacies (Minor): Scoria
• Sedimentary structures: Reversed graded bedding

• Host: Joso Formation
• Thickness: 10 - 40 cm

• Distribution: Chiba pref.

• Komatsubara et al. (2004) Geology of the Kisarazu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 64p. (in Japanese with English abstract 3p.)