Sengamine Andesite Rhyolite Member

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Sengamine Andesite Member Yoshikawa et al., 2005

Invalid synonym: Kanagase Andesite

Type locality: Shirakuchi - Shirakuchitoge pass, Ikuno, Asago city - Sakuhata, Kamikawa city, Kanzaki county, Hyogo prefecture
Volcanic rocks
Late Cretaceous
Intruded by: Rhyolite sills, Dikes

Lithofacies: Andesite - Dacite lava
Lithofacies (Lower, Minor): Lapilli tuff, Tuff breccia, Tuff
Lithofacies (Minor): Sandstone, Basalt
Sedimentary structures: Platy joints

Thickness: 240 m or thicker
Upper limit: Conformity (Shirakuchiyama Rhyolite Member)
Lower limit: Conformity (Kanagase Welded Tuff Member)

Ikuno Formation
[ Upper ]
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Shirakuchiyama Rhyolite Member
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Sengamine Andesite Member
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Kanagase Welded Tuff Member
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[ Lower ]

(Invalid name) Ikuno Group (Ikuno, Hyogo pref.)
[ Upper ]
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Mineyama Formation
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Kasagatayama Formation
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Nagusayama Formation
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Sasagamine Formation
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Yasudagawa Formation
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Myokenzan Formation
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Kamogawa Formation
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Ikuno Formation
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Tochihara Formation
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Okawachi Formation
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[ Lower ]

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

Distribution: Shirakuchi - Shirakuchitoge pass - Mount Takahatayama, Ikuno, Asago city, Hyogo pref.; Sakuhata - Mount Sengamine - Ohata - Ochi, Kamikawa city, Kanzaki county, Hyogo pref.

Yoshikawa et al. (2005) Geology of the Ikuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 3p.)