Tsurugaya Andesite Member

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Tsurugaya Andesite Member Ishii et al., 1982

Type locality: Tenshin elementary school, Tsurugaya, Tagajo city, Miyagi prefecture
Volcanic rocks
Miocene (13.6 Ma, K-Ar)

Sedimentary facies: Lava flow
Lithofacies: Andesite lava (more than 2 flow units)

Upper limit: Conformity (Main part of Toguhama Formation), Unconformity (Tomegaya Formation)

Toguhama Formation
[ Upper ]
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Tsurugaya Andesite Member / (Invalid name) Nirayama Dacite 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 Pyroclastic Rock
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Tenshin elementary school, Tsurugaya, Tagajo 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.)