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Obatake Rhyolite

• Type locality: Mount Nagisan, Obatake, Chizu city, Yazu county, Tottori prefecture
• Volcanic rocks
• Mesozoic

• Lithofacies: Rhyolite welded tuff
• Lithofacies (Lower, Minor): Tuff breccia
• Sedimentary structures: Eutaxitic
• Sedimentary structures (Minor): Spherulitic

• Thickness: A few dozen m
• Upper limit: Conformity (Nagisan Andesites)
• Lower limit: Unconformity (Sangun Metamorphic Rocks)

• Distribution: Obatake, Chizu city, Yazu county, Tottori pref.

• Yamada (1966) Chizu, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 11p.)