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Azuma-Sakuma Tephra Yamamoto, 2005

Abbr.: Az-SK

• Tephra
• Pleistocene (ca. 130 ka)

• Lithofacies: Orthopyroxene clinopyroxene dacite
• Lithofacies: Pumiceous lapilli
• Lithofacies (Minor): Crystalline ash

• Source: Azuma volcano
• Host: Higher II Terrace Deposit (Kawamata)
• Mode of eruption: Plinian
• Thickness: 8 - 20 cm

• Distribution: 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.)