Nagaiso Formation

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Nagaiso Formation

Type locality: Nagaiso seashore, Massaki town, Ofunato city, Iwate prefecture
Coherent formation
Cretaceous

Sedimentary facies: Marine
Lithofacies: Sandstone
Lithofacies (Minor): Slate, Tuffaceous slate

Thickness: 500 m
Upper limit: Unconformity (Koyama Formation)
Lower limit: Conformity (Upper Hijochi 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: Nagaiso seashore, Massaki town, Ofunato city, Iwate pref.

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.)