Yamadori Formation

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Yamadori Formation (Takahashi, 1941) Takizawa et al., 1974

Volcanic rocks
Early Cretaceous, Valanginian - Hauterivian

Sedimentary facies: Marine
Metamorphic facies: Prehnite-Pumpellyite
Lithofacies (Upper): Olivine basalt lava
Lithofacies (Lower): Dacite - andesite tuff breccia

Thickness: ca. 1,600 m
Lower limit: Unconformity (Domeki Sandstone Member Kobitawatashi Shale Member, Futawatashi Shale Member)

Yamadori Formation
[ Upper ]
?--?--?--?--?-
Upper Basalt Lava Member
--------------
Lower Andesitic Volcaniclastics Member
~~~~~~~~~~~~~~
[ Lower ]

Yamadori Formation
[ Upper ]
?--?--?--?--?-
Basaltic Volcaniclastics Member
?--?--?--?--?-
[ Lower ]

Karakuwa-Oshika Subbelt
[ Upper ]
?--?--?--?--?-
Yamadori Formation
~~~~~~~~~~~~~~
[ 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.

Takizawa et al. (1974) Geology of the Kinkasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 5p.)