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Kosugaya Tephra Makinouchi, 1975

• Type locality: Minamikosugaya, Kosugaya, Tokoname city, Aichi prefecture
• Tephra
• Pleistocene (4.63, 4.0 Ma, FT)
• Correlation: Marune Tephra

• Lithofacies: Volcanic ash (2 units)
• Sedimentary structures (Upper, Minor): Graded bedding, Parallel stratification, Convolute lamination

• Host: Tokoname Formation
• Thickness: ca. 0.3 - 2 m
• Thickness (Upper): 1 - 2 m
• Thickness (Lower): 5 - 10 cm

• Distribution: Minamikosugaya, Kosugaya, Tokoname city, Aichi pref.; Meitokujigawa river, Ishihama - Ogawa, Higashiura city, Chita county, Aichi pref.; Hiromi - Futto, Mihama city, Chita county, Aichi pref.

• Kondo and Kimura (1987) Geology of the Morozaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
• Yoshida and Ozaki (1986) Geology of the Handa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 98p. (in Japanese with English abstract 4p.)