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Akka Volcanic Ash

• Tephra
• Holocene (ca. 55 - 50 ka)
• Correlation: Towada-Chuseri Pyroclastic Fall Deposit

• Lithofacies: Glassy volcanic ash

• Source: Towada caldera
• Thickness: 5 - 15 cm

• Distribution: Iwate pref.

• Kawamura et al. (2013) Geology of the Hayachine San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)