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Hn Tephra

Abbr.: Hn

• Tephra
• Holocene

• Source: Mount Sanbesan
• Host: Nakaumi Formation

• Distribution: Shimane pref.

• Kano et al. (1998) Geology of the Iwami-Oda and Oura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)