Andesitic Pyroclastic Rock Member

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Andesitic Pyroclastic Rock Member

Volcanic rocks
Early Cretaceous

Sedimentary facies (Lower): under water
Lithofacies: Andesite - dacite tuff, Tuff breccia, Andesite lava
Lithofacies (Lower): Tuffaceous sandstone, Conglomerate

Thickness: ca. 300 - 500 m

Niitsuki Formation
[ Upper ]
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Andesite-basalt Lava and Pyroclastic Rocks Member
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Andesitic Pyroclastic Rock Member
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[ Lower ]

Kesennuma, Miyagi pref.
[ Upper ]
?--?--?--?--?-
Yokonuma Formation
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Kanaigaura Formation
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Niitsuki Formation
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Nagasaki Formation
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Isokusa Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Mount Takarasakai? - Mount Kimigahana - Sasanota pass, Daito town, Ichinoseki city, Iwate pref.

Takeuchi and Mikoshiba (2002) Geology of the Senmaya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 76p. (in Japanese with English abstract 3p.)