Matsukura Siliciclastic Rock Member

Matsukura Siliciclastic Rock Member (Matsubara, 1995) Tuzino et al., 2018

Invalid synonym: Matsukura Mudstone, Sandstone and Conglomerate Member

Type locality: Matsukura, Ninohe city, Iwate prefecture
Coherent formation
early Miocene (ca. 18 - 16 Ma)
Contemporaneous heterotopic facies: Keiseitoge Volcanic Rock Member

Sedimentary facies: Fluvial
Sedimentary facies: Debris flow deposit
Climate: Warm-temperate
Lithofacies: Interbedded conglomerate, Sandstone and Mudstone

Thickness: ca. 200 m
Upper limit: Interfingered (Koiwai Mudstone Member, Keiseitoge Volcanic Rock Member)
Lower limit: Unconformity (North Kitakami Belt)

Yotsuyaku Formation
[ Upper ]
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Sukohata Siliciclastic Rock Member
-------''''/,,,
Keiseitoge Volcanic Rock Member
-------''''/,,,
Koiwai Mudstone Member
-------''''/,,,
Matsukura Siliciclastic Rock Member
~~~~~~~~~~~~~~
[ Lower ]

Shiratorigawa Group
[ Upper ]
~~~~~~~~~~~~~~
Suenomatuyama Formation
--------------
Kadonosawa Formation
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Yotsuyaku Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Matsukura - Shiratori - Tsunagi - Koiwai - Makaja - Ishikura, Ninohe city, Iwate pref.; Mount Kogura - Nishiyama, Kunohe city, Kunohe county, Iwate pref.; Kozuya - Nojiri - Hiranuka - Takamagi - Oshida - Fukagawa, Ichinohe city, Ninohe county, Iwate pref.
Fossils: Bivalves, Rhinoceroses (Femur)
Fossils (Plants): Actinodaphne sp., Alnus sp., Carpinus sp., Carya sp., Cinnamomum sp., Cyclobalanopsis sp., Juglans sp., Liquidambar japonica, Metasequoia sp., Rhododendron sp.

Tuzino et al. (2018) Geology of the Ichinohe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 161p. (in Japanese with English abstract 4p.)