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Hatsutoji Formation (Kishida and Wadatsumi, 1967) Igi and Wadatsumi, 1980

Invalid synonym: Hatsutoji Rhyolite

• Type locality: Hatsutoji, Yoshinaga town, Bizen city, Okayama prefecture
• Volcanic rocks
• Late Cretaceous

• Lithofacies: Rhyolite lava
• Sedimentary structures: Flow structures, Spherulitic structures

• Thickness: ca. 380 m
• Lower limit: Conformity (Gomyo Formation)

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

• Distribution: Hatsutoji, Yoshinaga town, Bizen city, Okayama pref.

• Igi and Wadatsumi (1980) Geology of the Kamigori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 74p. (in Japanese with English abstract 4p.)