Arg-1 Tephra

Abbr.: Arg-1

Type locality: Tazawa, Nishiyama town, Kashiwazaki city, Niigata prefecture
Tephra
Pliocene - Pleistocene

Lithofacies: Vitreous volcanic ash
Sedimentary structures: Graded bedding

Thickness: 10 - 15 cm
Host: Nishiyama Formation

Arg Tephra
[ Upper ]
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Arg-2
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Arg-1
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[ Lower ]

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

Distribution: Tazawa, Nishiyama town, Kashiwazaki city, Niigata pref.; Jorakuji, Izumozaki city, Santo county, Niigata pref.

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.)