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Hap Tephra Sawaguri and Kurokawa, 1986

Abbr.: Hap

• Type locality: Kunisawa river - Ishikawa pass, Oguni town, Nagaoka city, Niigata prefecture
• Tephra
• Pliocene - Pleistocene

• Lithofacies: Volcanic ash

• Host: Nishiyama Formation, Hachikokusan Formation

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Kunisawa river - Ishikawa pass, Oguni town, Nagaoka city, Niigata pref.; Jorakuji - Tanaka - Notsubo, Izumozaki city, Santo county, Niigata pref.; Fujikake, Nishiyama town, Kashiwazaki city, Niigata pref.; Yoshiikurokawa, Kashiwazaki city, Niigata pref.; Aburaden, Kariwa city, Kariwa county, Niigata pref.

• 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.)
• Kobayashi et al. (1989) Geology of the Okanomachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 5p.)