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Oshirakawa Complex (Kurokawa et al., 1987) Hara and Kashiwagi, 2004

• Type locality: Tsuchikuzure creek, Otochiyama, Uonuma city, Niigata prefecture
• Accretionary complex
• Deposition (Limestone): Middle Permian (Fusulinids)
• Deposition (Chert): late Hettangian - early Sinemurian, Early Jurassic (Radiolarians)
• Deposition (Siliceous shale): late Hettangian - early Sinemurian, Early Jurassic (Radiolarians)
• Deposition (Shale): late Sinemurian - early Pliensbachian, Early Jurassic (Radiolarians)
• Accretion: Early Jurassic

• Sedimentary facies: Marine
• Lithofacies: Mélange facies
• Matrix: Mudstone
• Exotic blocks (Crusts): Greenstones, Sandstone, Limestone, Chert

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

• Distribution: Tsuchikuzure creek Suezawa river - Kottaga creek - Ashizawa creek - Kemo creek, Aburuma river, Otochiyama, Uonuma city, Niigata pref.; Lake Tagokura, Tadami city, Minamiaizu county, Fukushima pref.
• Fossils (Limestone, Fusulinids): Chusenella sp., Kallerina sp., Neoschwagerina sp., Parafusulina sp.
• Fossils (Chert, Radiolarians): Canoptum cf. anulatum, Canoptum? cf. rugosum, Eucyrtidiellum unumaense, Homoeoparonaella? sp., Orbiculiforma sp., Pantanellium cf. browni, Parahsuum aff. simplum, Paronaella sp.
• Fossils (Siliceous shale, Radiolarians): Atalanta cf. epaphrodita, Betraccium sp., Canoptum spp., Charlottea? sp., Nitrader? sp., Pantanellium spp., Protokatroma aquila, Udalia spp.
• Fossils (Shale, Radiolarians): Bagotum pseudoerraticum, Canoptum cf. anulatum, Foremania cf. sandilandsensis, Katroma angusta, Natoba minuta, Palaeosaturnalis spp., Pantanellium spp., Parahsuum cf. ovale, Parahsuum simplum, Paronaells sp., Stichocapsa sp., Wrangellium sp., Zartus? sp.

• Takahashi et al. (2004) Geology of the Suhara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 80p. (in Japanese with English abstract 4p.)