Shimotakaku Formation

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Shimotakaku Formation

Coherent formation
southern Yezo Forearc basin (Jobanoki basin)
early Miocene

Sedimentary facies: Marine
Sedimentary facies: Outer shelf - Upper continental slope
Lithofacies (Upper): Diatomaceous siltstone, Siltstone
Lithofacies (Middle): Tuffaceous sandstone
Lithofacies (Middle, Minor): Conglomerate
Lithofacies (Lower): Tuffaceous mudstone, Sandstone

Thickness: 130 m
Upper limit: Unconformity (Taga Group)

Takaku Group
[ Upper ]
~~~~~~~~~~~~~~
Shimotakaku Formation
--------------
Numanouchi Formation
--------------
Kamitakaku Formation
~~~~~~~~~~~~~~
[ Lower ]

Takaku Group
[ Upper ]
?--?--?--?--?-
Kokozura Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Fukushima pref.

Ando et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.49-67 DOI
Kubo et al. (2002) Geology of the Kawamae and Ide District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 136p. (in Japanese with English abstract 6p.)
Iwao and Matsui (1961) Taira and Kawamae, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 17p.)