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Kuzu Complex, Unit 3 (Photo)

Invalid synonym: Aso Group, Adoyama Formation, Maki Formation, Mikagura Formation

• Type locality: Tochigi prefecture
• Accretionary complex
• Deposition (Siliceous claystone): Early Triassic (Conodonts, Radiolarians)
• Deposition (Chert): Triassic, Jurassic (Conodonts, Radiolarians)
• Deposition (Siliceous mudstone): Middle Jurassic, Bajocian - early Bathonian; Middle Jurassic, late Callovian - Late Jurassic, Oxfordian (Radiolarians)
• Deposition (Mudstone): Middle Jurassic, Bajocian - early Bathonian; Middle Jurassic, late Callovian - Late Jurassic, Oxfordian (Radiolarians)
• Accretion: Late Jurassic
• Correlation: Imajo Formation

• Sedimentary facies: Marine
• Lithofacies: Coherent facies (Chert-clastic sequence)
• Lithofacies (Top): Sandstone
• Lithofacies (Upper): Interbedded sandstone and mudstone
• Lithofacies (Middle): Mudstone
• Lithofacies (Lower middle): Siliceous mudstone
• Lithofacies (Lower): Chert
• Lithofacies (Bottom): Siliceous claystone

• Upper limit: Thrust fault
• Lower limit: Thrust fault

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

• Distribution: Tochigi pref.

• Ito et al. (2022) Geology of the Kiryu and Ashikaga District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)
• Yamakita and Otoh (2000) Structural Geology, vol.44, pp.5-32
• Fujimoto (1961) Tochigi, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 6p.)
• Kawata and Ozawa (1955) Ashio, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 7p.)