Takonoura Formation

[ Top ] [ Japanese ]

Takonoura Formation Onuki and Mori, 1961

Type locality: Takonoura, Akasaki town, Ofunato city, Iwate prefecture
Coherent formation
Contact metamorphism by Goyosan Pluton
Deposition: Early Cretaceous
Metamorphism: Early Cretaceous

Sedimentary facies: Marine (Shellfishes)
Lithofacies: Sandstone, Shale
Lithofacies (Minor): Felsic tuff

Thickness: ca. 180 m or thicker
Lower limit: Bottom of a sandstone bed overlying andesite
Lower limit: Conformity (Ryori Formation)

Ofunato Group (Ryori, Iwate pref.)
[ Upper ]
?--?--?--?--?-
Takonoura Formation
--------------
Ryori Formation
--------------
Attari Formation
?--?--?--?--?-
[ Lower ]

Ofunato Group (Ofunato, Iwate pref.)
[ Upper ]
?--?--?--?--?-
Nagaiso Formation
--------------
Upper Hijochi Formation
--------------
Lower Hijochi Formation
--------------
Funagawara Formation
?--?--?--?--?-
[ Lower ]

Ofunato Subelt
[ Upper ]
?--?--?--?--?-
Massaki Group
~~~~~~~~~~~~~~
Ofunato Group
?--?--?--?--?-
[ Lower ]

South Kitakami Belt (after Permian)
[ West ]
::::::::::::::
Shizukawa-Hashiura Subbelt
::::::::::::::
Karakuwa-Oshika Subbelt
::::::::::::::
Ofunato Subelt
::::::::::::::
[ East ]

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

Distribution: Takonoura, Akasaki town, Ofunato city, Iwate pref.
Fossils: Shellfishes

Nishioka and Yoshikawa (2004) Geology of the Ryori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 49p. (in Japanese with English abstract 3p.)