Nagaogawa Formation

[ Top ] [ Japanese ]

Nagaogawa Sandstone Member Kawakami and Shishikura, 2006

Type locality: Ryuoka, Tateyama city, Chiba prefecture
Coherent formation
Trench fill sediments, Landward slope basin of trench
Pleistocene

Sedimentary facies: Marine
Lithofacies: Sandstone-dominant interbedded sandstone and tuffaceous siltstone

Thickness: ca. 200 m
Upper limit: Unconformity (Kamo Formation)

Hata Formation
[ Upper ]
--------------
Nagaogawa Sandstone Member
--------------
[ Lower ]

Chikura Group (Northern part)
[ Upper ]
?--?--?--?--?-
Negata Formation
--------------
Sagashi Formation
?--?--?--?--?-
[ Lower ]

Chikura Group
[ Upper ]
?--?--?--?--?-
Hata Formation
-------'''/,,,
Mera Formation
--------------
Shiramazu Formation
--------------
Shirahama Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Ryuoka - Kanamari, Tateyama city, Chiba pref.
Fossils: Foraminifera, Radiolarians, Diatoms, Calcareous nannofossils

Utagawa et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.11, pp.969-976 DOI
Kawakami and Shishikura (2006) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 82p. (in Japanese with English abstract 5p.)