Kiyotsu Formation

[ Top ] [ Japanese ]

Kiyotsu Formation

Type locality: Shibahara pass, Yuzawa city, Minamiuonuma county, Niigata prefecture
Type locality: Kiyotsu river, Yagisawa, Yuzawa city, Minamiuonuma county, Niigata prefecture
Coherent formation
Miocene
Correlation (Upper): Otani Formation
Correlation (Lower): Tonoiri Formation
Intruded by: Kiyotsukyo Quartz Diorite Porphyry, Porphyrite

Lithofacies:

Thickness: 950 - 1,360 m
Upper limit: Conformity (Uwano Formation), Unconformity (Uonuma Formation, Iiji volcano)

Kiyotsu Formation
[ Upper ]
--------------
Omine Sandstone Shale Member
--------------
Yagisawa Tuff Member
--------------
Yuzawa Sandstone Conglomerate Member
--------------
Shibahara Tuff Member
--------------
[ Lower ]

Yuzawa, Niigata pref.
[ Upper ]
--------------
Kiyotsu Formation
?--?--?--?--?-
Shiraita Formation
--------------
Matsukawa Formation
--------------
[ Lower ]

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

Distribution: Shibahara pass, Yuzawa city, Minamiuonuma county, Niigata pref.; Yagisawa - Nanatagiri, Yuzawa city, Minamiuonuma county, Niigata pref.; Ishiuchi, Minamiuonuma city, Niigata pref.

Yanagisawa et al. (1985) Geology of the Tokamachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 104p. (in Japanese with English abstract 6p.)
Chihara et al. (1981) Geology of the Echigo-Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 108p. (in Japanese with English abstract 8p.)