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K-Ah Tephra

Abbr.: K-Ah

• Tephra
• Pleistocene (ca. 7.3 cal ka BP, ¹⁴C, Lake Suigetsu core)

• Source: Kikai caldera, Kagoshima, Kyushu island, Japan
• Host: Tokushima Formation, Ayagawa Formation, Urado Formation, Matsuyama Formation, Uwajimako Sandy Muds Member

• Distribution: Kyushu island - middle Tohoku region, Honshu island, Japan
• Distribution: Chikuni, Otari city, Kitaazumi county, Nagano pref.

• Okuno (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.41-53 DOI
• Ueki et al. (2013) Geology of the Hachioji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 137p. (in Japanese with English abstract 6p.)
• Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)