Tokuma Member

[ Top ] [ Japanese ]

Tokuma Member (Matsuda, 1961) Sugiyama and Matsuda, 2014

Type locality: Banryu bridge, Tokuma, Nanbu city, Minamikoma county, Yamanashi prefecture
Volcanic rocks
late Miocene
Correlation: Takatori Volcaniclastic Rocks, Sandstone and Mudstone Member

Sedimentary facies: Marine
Lithofacies: Turbidite
Lithofacies: Andesite tuff, Tuff breccia, Interbedded sandstone and mudstone

Thickness: 1,300 m
Upper limit: Transitional (Shinoisan Member)
Lower limit: Conformity (Kuonji Formation)

Aimata Formation (North)
[ Upper ]
--------------
Karasumoriyama Volcaniclastic Rocks Member
--------------
Takatori Volcaniclastic Rocks, Sandstone and Mudstone Member
--------------
[ Lower ]

Aimata Formation (South)
[ Upper ]
--------------
Shinoisan Member
--------------
Tokuma Member
--------------
[ Lower ]

Fujikawa Group (Central zone)
[ Upper ]
--------------
Hamaishidake Formation / Akebono Formation
--------------
Aimata Formation
--------------
Kuonji Formation
--------------
Hara Formation
--------------
[ Lower ]

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

Distribution: Oshiro, Minobu city, Tokuma pass, Nanbu city, Minamikoma county, Yamanashi pref. - Shimizu ward, Shizuoka city, Shizuoka pref.; Tokuma, Nanbu city, Minamikoma county, Yamanashi pref.

Sugiyama and Matsuda (2014) Geology of the Nanbu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 134p. (in Japanese with English abstract 5p.)