Chw-2 Tephra

Abbr.: Chw-2

Type locality: Chuei, Mishima, Nagaoka city, Niigata prefecture
Tephra
Pliocene - Pleistocene

Lithofacies: Pumiceous volcanic ash

Thickness: 0 - 30 cm
Host: Nishiyama Formation

Chw Tephra
[ Upper ]
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Chw-4
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Chw-3
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Chw-2
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Chw-1
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[ Lower ]

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

Distribution: Chuei, Mishima, Nagaoka city, Niigata pref.; Yoshikawa - Ogamaya - Jorakuji, Izumozaki city, Mito 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.)