Usutaniyama Rhyolitic Lava

Usutaniyama Rhyolitic Lava (Ikawa and Imaoka, 2001) Imaoka et al., 2019

Type locality: Mount Usutani, Tokusa, Ato, Yamaguchi city, Yamaguchi prefecture
Volcano-plutonic complex
Volcanic rocks
Late Cretaceous

Sedimentary facies: Upward-opening funnel shape
Lithofacies: Rhyolite

Ikumo Caldera
[ Upper ]
?--?--?--?--?-
Intrusive pyroclastic rock
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Usutaniyama Rhyolitic Lava
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Okukano Felsic Intrusive Rocks
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Ikumo Formation
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[ Lower ]

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

Distribution: Mount Usutani, Tokusa, Ato, Yamaguchi city, Yamaguchi pref.; Chomon valley, Kawakami, Hagi city, Yamaguchi pref.; Jifukushimo, Ato, Yamaguchi city, Yamaguchi pref.

Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI