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Ad-DK Tephra Soda and Saijo, 1987

Abbr.: Ad-DK, Ad-D

• Tephra
• Pleistocene (ca. 0.11 Ma)
• Contemporaneous heterotopic facies: Numajiri Pyroclastic Flow Deposit

• Lithofacies: Orthopyroxene clinopyroxene dacite - andesite
• Lithofacies: Pumice
• Sedimentary structures: Reversed graded bedding

• Source: Numanotaira crater, Adatara volcano
• Host: Higher I Terrace Deposit (Kawamata), Higher II Terrace Deposit (Kawamata)
• Mode of eruption: Plinian
• Eruptive volume: ca. 1 km³
• Thickness: 5 - 70 cm
• Lower limit: Conformity (Yukawa Pyroclastic Flow Deposit)

• Distribution: Minamiebi, Kashima ward, Minamisoma city, Fukushima pref.

• 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.)
• Yanagisawa et al. (1996) Geology of the Somanakamura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 9p.)
• Sakaguchi (1995) Geology of the Nihonmatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 4p.)