Pyroclastic Rock 3

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Pyroclastic Rock 3

Volcanic rocks
late Miocene

Sedimentary facies (Upper): Pyroclastic fall deposits
Sedimentary facies (Lower): Pyroclastic flow deposits
Lithofacies (Upper): Rhyolitic lapilli tuff, Tuff
Lithofacies (Lower): Rhyolitic lapilli tuff, Tuff breccia
Lithofacies (Bottom): Volcanic conglomerate

Host: Goka Rhyolite, Tsuma Rhyolite

Lower part
[ Upper ]
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Pyroclastic Rock 3
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Pyroclastic Rock 2
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Pyroclastic Rock 1
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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: Mount Kitayama - Cape Misaki - Omine tunnel - Ozuku - Mount Omineyama - Utagi - Nukadani, 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.)