Tajima Vent-fill Breccia

[ Top ] [ Japanese ]

Tajima Vent-fill Breccia Koido et al., 1990

Type locality: Hidagawa river, Tajima, Kanayama town, Gero city, Gifu prefecture
Volcanic rocks
One of the source vent of Atera Formation
Late Cretaceous - Paleogene
Intruded in: Yumoriyama-Kanayama Welded Tuff, Atera Formation, Shimoyui Granodiorite Porphyry, Mino Belt

Sedimentary facies: Vent-fill breccia
Lithofacies: Volcanic breccia, Lapilli tuff, Tuffaceous conglomerate
Lithofacies (Minor): Crystalline tuff

Distribution (Width): ca. 100 - 500 m
Distribution (Length): ca. 0.3 - 1.3 km
Upper limit: Unconformity (Atera Formation)

Tajima Vent-fill Breccia
[ Young ]
~~~~~~~~~~~~~~
Vent Breccia III
~~~~~~~~~~~~~~
Vent Breccia II
~~~~~~~~~~~~~~
Vent Breccia I
~~~~~~~~~~~~~~
[ Old ]

Atera Formation
[ Upper ]
~~~~~~~~~~~~~~
Tajima Vent-fill Breccia
~~~~~~~~~~~~~~
[ Lower ]

Sequence IV (Southern area)
[ Upper ]
~~~~~~~~~~~~~~
Uguigawa Welded Tuff
--------------
Mayumitoge Welded Tuff
~~~~~~~~~~~~~~
Takadaru Welded Tuff
--------------
Atera 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: Tajima - Mount Mimuneyama, Kanayama town, Gero city, Gifu pref.; Kamiyui - Kuzumaki - Ako, Shirakawa city, Kamo county, Gifu 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.)