Tuffaceous Sandstone Sandy Siltstone Member

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Tuffaceous Sandstone Sandy Siltstone Member Ishii et al., 1982

Type locality: Nagome, Matsushima city, Miyagi county, Miyagi prefecture
Coherent formation
Miocene

Sedimentary facies: Marine
Lithofacies: Tuffaceous sandstone, Sandy siltstone
Sedimentary structures: Cross stratification, Bioturbation, Pipe rocks

Thickness: 0 - ca. 80 m
Upper limit: Conformity (Diatomaceous Siltstone Member), Unconformity (Mitsuya Formation)
Lower limit: Conformity (Siltstone Member)

Otsuka Formation
[ Upper ]
~~~~~~~~~~~~~~
Siltstone Sandstone Member
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Diatomaceous Siltstone Member
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Tuffaceous Sandstone Sandy Siltstone Member
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Siltstone Member
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[ Lower ]

Matsushimawan Group
[ Upper ]
~~~~~~~~~~~~~~
Otsuka Formation
-------'''/,,,
Toguhama Formation
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Matsushima Formation
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Ajiri Formation
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Sauramachi Formation
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Shiogama Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nagome, Matsushima city, Miyagi county, Miyagi pref.; Hatanaka - Otsuka - Marutsuka, Higashimatsushima city, Miyagi pref.

Ishii et al. (1983) Geology of the Shiogama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 6p.)
Ishii et al. (1982) Geology of the Matsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 9p.)