Terayama Shoshonite

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Terayama Shoshonite

Volcanic rocks
late Miocene (5.5 - 5.1 Ma, K-Ar)
Intruded in: Kori Formation

Lithofacies: Shoshonite lava, Sill

Thickness: ca. 30 m

Upper part (South)
[ Upper ]
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Takugi Trachyandesite / Terayama Shoshonite
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Yokooyama Trachyte
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[ Lower ]

Omosu Formation
[ Upper ]
~~~~~~~~~~~~~~
Upper part
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Middle part
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Lower part
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[ Lower ]

Oki-Dogo island, Shimane pref.
[ Upper ]
~~~~~~~~~~~~~~
Omosu Formation
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Tsuma Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Dairyo - Mount Terayama - Sakae town - Takugi - Saigo bay - Mount Kinbusan - Yui seashore - Kumi, Okinoshima city, Oki county, Shimane pref.

Yamauchi et al. (2009) Geology of the Saigo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 118p. (in Japanese with English abstract 3p.)