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Towada-b Tephra

Abbr.: To-b

• Holocene (2.2 cal ka BP)

• Sedimentary facies: Terrestrial
• Lithofacies: Volcanic ash

• Source: Towada caldera

• Distribution: Mount Hakkoda, Aomori pref.

• Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)