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As-C Tephra

Abbr.: As-C

• Tephra
• Holocene (middle 4th century)

• Lithofacies: Pyroxene andesite pumice

• Source: Maekake volcano
• Thickness: ca. 0 - 20 cm

• 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.)