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Ka Tephra Mizuno et al., 1987

Abbr.: Ka

• Type locality: Kasana, Makinohara city, Shizuoka prefecture
• Tephra
• middle Miocene - Pliocene (5.8 Ma, FT)

• Lithofacies: β-quartz-bearing volcanic ash

• Host: Yokobuna Mudstone, Sagara Alternation
• Thickness: 30 - 60 cm

• Distribution: Kasana, Makinohara city, Shizuoka pref.; Yokobuna, Omaezaki city, Shizuoka pref.

• Sugiyama et al. (1988) Geology of the Omaezaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 153p. (in Japanese with English abstract 6p.)