Tsunagizaka Formation

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Tsunagizaka Formation

Coherent formation
Middle Jurassic, Bajocian (Ammonoids)

Sedimentary facies: Marine
Lithofacies: Slate, Sandstone

Upper limit: Unconformity (Ishiwaritoge Formation)
Lower limit: Conformity (Kosaba Formation)

Karakuwa Group
[ Upper ]
~~~~~~~~~~~~~~
Tsunagizaka Formation
--------------
Kosaba Formation
~~~~~~~~~~~~~~
[ Lower ]

Karakuwa-Oshika Subbelt
[ Upper ]
?--?--?--?--?-
Shishiori Group
~~~~~~~~~~~~~~
Karakuwa Group
~~~~~~~~~~~~~~
[ Lower ]

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

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

Distribution: Miyagi pref.
Fossils: Ammonoids (Stephanoceras cf. plicatissimum)

Kambe and Shimazu (1961) Kesennuma, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 16p.)