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Ichinose Rhyolite Kano et al., 2007

Invalid synonym: Ichionose Member, Ichinose Formation

Invalid synonym (Upper): Takasuyama Andesite, Hokoshima Volcanic Rocks

• Volcanic rocks
• Miocene (15.7 Ma, FT)
• Intruded by: Kunimidake Volcanic Rocks, Basalt - Andesite dykes

• Sedimentary facies (Upper): Lava dome
• Sedimentary facies (Lower): Pyroclastic flow deposit
• Lithofacies (Upper): Biotite hornblende rhyolite lava
• Lithofacies (Lower): Rhyolite pumiceous lapilli tuff, Tuff
• Sedimentary structures (Upper): Columnar joint
• Sedimentary structures (Lower): Graded bedding, Parallel stratification

• Thickness: 300 - 500 m
• Distribution (Lava dome, Diameter): 2 km or more
• Upper limit: Unconformity (Kunimidake Volcanic Rocks, Middle III Marine Terrace Deposits)
• Lower limit: Unconformity (Aratani Formation, Kunimi Formation)

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

• Distribution (Tuff): Ichinose town, Fukui city, Fukui pref.
• Distribution (Lava dome): Mera town - Ayukawa town, Fukui city, Fukui pref.

• Kano et al. (2007) Geology of the Fukui District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 68p.