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Kuzu Complex, Unit 2

Invalid synonym: Aso Group, Nabeyama Formation, Izuru Formation

• Type locality: Tochigi prefecture
• Accretionary complex
• Deposition (Limestone): Permian (Fossils)
• Accretion: Middle Jurassic
• Correlation: Funabuseyama Formation

• Sedimentary facies: Marine
• Lithofacies (Upper): Mudstone
• Lithofacies (Middle): Conglomerate, Siliceous mudstone
• Lithofacies (Lower): Carbonate rocks, Basaltic rocks

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

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

• Distribution: Tochigi pref.
• Fossils (Limestone): Sharks, Trilobites, Corals, Foraminifera, Conodonts
• Fossils (Limestone, Brachiopods): Davisiella comoides, Enteletes acutiplicatus, Martinia sp., Meekella gigantea, Orthotetina planoconvexa, Orthotichia eusarkos subsp. lata, Orthotichia japonica, Orthotichia japonica subsp. striata, Productus (Echinoconchus) defensus, Spirifer acutiplicatus, Squamularia sp., Streptorhynchus sp.
• Fossils (Limestone, Fusulinids): Codonofusiella paradoxica, Minojapanella elongata, Neoschwagerina colaniae, Neoschwagerina margaritae, Parafusulina japonica, Parafusulina kaerimizensis, Parafusulina kattaensis, Parafusulina splendens, Parafusulina yabei, Pseudoliolina ozawai, Pseudofusulina ambigua, Pseudofusulina granum avenae, Pseudofusulina cf. tenuissima, Pseudofussulina vulgaris, Pseudofusulina vulgaris var. watanabei, Rausellera elatica, Schubertella kiugi, Schubertella simplex, Schwagerina guembeli, Schwagerina guembeli var. pseudoregularis, Schwagerina krotowi, Schwagerina margheritii, Schwagerina ominensis, Schwagerina prisca, Yabeina columbiana, Yaugchienia sp.
• Fossils (Mudstone gravel in conglomerate): Ammonoids

• 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.)