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Ikuno Formation Yoshikawa et al., 2005

• Type locality: Mayumi - Mount Takahatayama, Ikuno, Asago city, Hyogo prefecture
• Volcanic rocks
• Late Cretaceous
• Intruded by: Rhyolite sills, Dikes, Granodiorite

• Lithofacies (Top): Biotite rhyolite lava, Lapilli tuff
• Lithofacies (Upper): Andesite - Dacite weldded lapilli tuff, Tuff, Lava
• Lithofacies (Middle): Biotite rhyolite lava, Tuff, Lapilli tuff
• Lithofacies (Lower): Dacite - Rhyolite tuff, Lapilli tuff, Andesite - Dacite lava, Tuff, Lapilii tuff, Tuffaceous sandstone, Mudstone

• Thickness: 560 - 1,500 m or thicker
• Upper limit: Unconformity (Myokenzan Formation, Kasagatayama Formation)
• Lower limit: Unconformity (Wakai Complex, Okawachi Formation, Tochihara Formation)

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

• Distribution: Mayumi - Mount Takahatayama - Kuchiganaya - Inono, Ikuno, Asago city, Hyogo pref.; Isarigami - Okuarata - Mount Mataniyama, Taka city, Taka county, Hyogo pref.; Ochi - Shinden, 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.)