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My-Hb Tephra

Abbr.: My-Hb

Invalid synonym: HB

• Tephra
• Pleistocene
• Correlation: Shibuegawa Pyrocalstic Flow Deposit

• Lithofacies: Pumiceous volcanic ash

• Host: Hirayama Loam
• Thickness: 1 m
• Lower limit: Unconformity (Hikarigahara Landslide Deposits, Higher 3 Terrace Deposit)

• Distribution: Mount Takayuka, Niigata pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)