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Ngm Tephra Kikuchi et al., 1984

Abbr.: Ngm

Invalid synonym: Mi Tuff

• Type locality: Haizume, Nishiyama town, Kashiwazaki city, Niigata prefecture
• Tephra
• Pliocene - Pleistocene (2.95 Ma, FT)
• Correlation: Mk

• Lithofacies: Vitreous volcanic ash
• Sedimentary structures: Graded bedding

• Host: Nishiyama Formation
• Thickness: ca. 2 cm

• Distribution: Haizume - Kamiyamada - Monomiyama - Myohoji, Nishiyama town, Kashiwazaki city, Niigata pref.; Jorakuji - Kamijo - Tanaka, Izumozaki city, Santo county, Niigata pref.; Sochi pass, Kashiwazaki city, Niigata pref.; Aburaden, Kariwa city, Kariwa county, Niigata pref.

• Kobayashi et al. (2002) Geology of the Sanjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 98p. (in Japanese with English abstract 4p.)
• Kobayashi et al. (1995) Geology of the Kashiwazaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 102p. (in Japanese with English abstract 4p.)
• Kobayashi et al. (1993) Geology of the Izumozaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 4p.)