Setogawa Welded Tuff

Setogawa Welded Tuff Yamada et al., 1971

Type locality: Setogawa river, Otakigawa river, Otaki city, Kiso county, Nagano prefecture
Volcanic rocks
Caldera
Late Cretaceous - Paleogene (66.0 Ma, FT)

Lithofacies: Rhyolitic dacite welded tuff (A flow unit)

Thickness: ca. 500 - 700 m or thicker
Distribution (Length): ca. 30 km
Upper limit: Unconformity (Ontake volcano)
Lower limit: Conformity (Kurosawa Breccia), Unconformity (Uguigawa Welded Tuff)

Sequence V (Southern area)
[ Upper ]
~~~~~~~~~~~~~~
Sotobayama Welded Tuff
~~~~~~~~~~~~~~
Setogawa Welded Tuff
--------------
Kurosawa Breccia
--------------
Shirakawa Formation
~~~~~~~~~~~~~~
[ Lower ]

Nohi Rhyolites
[ Upper ]
~~~~~~~~~~~~~~
Sequence VI
~~~~~~~~~~~~~~
Sequence V
~~~~~~~~~~~~~~
Sequence IV
~~~~~~~~~~~~~~
Sequence III
~~~~~~~~~~~~~~
Sequence II
~~~~~~~~~~~~~~
Sequence I
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Setogawa river - Mount Sawarataniyama, Otakigawa river, Otaki city, Kiso county, Nagano pref.; Kurosawa, Agematsu city, Kiso county, Nagano pref.

Wakita and Koido (1994) Geology of the Gero District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 5p.)
Mizutani and Koido (1992) Geology of the Kanayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)
Yamada and Kobayashi (1988) Geology of the Ontakesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 9p.)
Kawada et al. (1988) Geology of the Hagiwara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 82p. (in Japanese with English abstract 10p.)
Yamada et al. (1985) Geology of the Takayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)