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As-Sj Tephra

Abbr.: As-Sj

• Tephra
• Pleistocene (ca. 13 ka)

• Lithofacies: Pyroxene andesite pumice

• Source: Asama volcano

• Distribution: Gunma pref.

• Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)