Siltstone Member

[ Top ] [ Japanese ]

Siltstone Member Ishii et al., 1982

Invalid synonym: Murohama Formation

Type locality: Mount Otakamori, Miyato island, Higashimatsushima city, Miyagi prefecture
Coherent formation
Miocene

Sedimentary facies: Marine
Lithofacies: Interbedded tuffaceous - sandy siltstone and tuffaceous sandstone

Thickness: 30 - 40 m
Upper limit: Conformity (Upper Pumice Tuff Member)
Lower limit: Conformity (Tuff Breccia Member)

Matsushima Formation
[ Upper ]
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Upper Pumice Tuff Member
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Siltstone Member
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Tuff Breccia Member
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Middle Pumice Tuff Member
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Lower Pumice Tuff 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: Mount Otakamori, Miyato island, Higashimatsushima city, Miyagi pref.; Takagi river - Fukuura island - Yakeshima island - Eshima island - Mahanashi island, Matsushima city, Miyagi county, Miyagi pref.; Toguhama, Shichigahama city, Miyagi county, 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.)