(Invalid name) Nirayama Dacite Member

(Invalid name) Nirayama Dacite Member (Shibata and Fujita, 1966) Ishii et al., 1983

Invalid synonym: Nirayama Andesite

Type locality: Mount Nirayama, Shichigahama city, Miyagi county, Miyagi prefecture
Volcanic rocks
Mega blocks included in pyroturbidites of Toguhama Formation
Miocene (15.5 Ma, K-Ar)

Lithofacies: Dacite lava

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: Mount Nirayama - Kurosaki - Cape Hanabuchi - Shiomidai - Agawanuma - Ekiraku - Cape Hoezaki - Shizu, Shichigahama city, Miyagi county, Miyagi pref.; Tsurugaya, Tagajo city, Miyagi pref.; Funairi island - Nabe island, Shiogama city, Miyagi pref.

Kitamura et al. (1986) Geology of the Sendai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 134p. (in Japanese with English abstract 9p.)
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.)