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Azuma-Fukushima Tephra (Soda and Sanjo, 1987) Yamamoto and Sakaguchi, 2000

Abbr.: Az-FK

• Tephra
• Pleistocene (ca. 140 ka)

• Lithofacies: Orthopyroxene clinopyroxene dacite
• Lithofacies: Pumiceous lapilli

• Source: Azuma volcano
• Host: Higher II Terrace Deposit (Kawamata)
• Mode of eruption: Plinian
• Thickness: 5 - 40 cm

• Distribution: Harimichi, Nihonmatsu city, Fukushima pref.

• Furukawa et al. (2018) Geology of the Azuma Yama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 74p. (in Japanese with English abstract 3p.)
• Kubo et al. (2015) Geology of the Kawamata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)