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Nabi Unit (Wakita, 1988)

Invalid synonym: Nabi Formation, Nabigawa Formation

• Type locality: Nabigawa river, Hachiman town, Gujo city, Gifu prefecture
• Accretionary complex
• Deposition (Limestone): Cisuralian - Guadalupian, Permian (Fusulinids)
• Deposition (Chert): Middle - Late Triassic (Radiolarians, Conodonts)
• Deposition (Siliceous shale): Middle Jurassic (Radiolarians)
• Accretion: Middle - Late Jurassic (Radiolarians)
• Correlation: Nabi Unit (except Kuzuhara Formation), Arihara Complex

• Sedimentary facies: Marine
• Lithofacies: Broken facies
• Matrix: Mudstone
• Exotic blocks (Slabs): Chert, Interbedded sandstone and mudstone
• Exotic blocks (Slabs, Minor): Basalt lava, Pyroclastic rocks, Sandstone, Limestone, Interbedded siliceous micrite and chert
• Sedimentary structures: Graded bedding, Parallel stratification, Load cast, Groove marks, Flute marks, Ripple marks
• Paleocurrent: from Southeast to Northwest, from North to South

• Thickness: Several thousands m
• Upper limit: Thrust fault (Funabuseyama Formation), Unconformity (Taragadani Formation, Matsunedani Formation, Kuzuredani Formation, Kibishimagawa Formation)
• Lower limit: Thrust fault

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

• Distribution: Mount Funabuse, Gifu pref.; Nabigawa river - Nagaragawa river - Kibishimagawa river - Nishiotsupara - Akaike - Shiratani valley - Hinatadani valley - Itani valley - Kamagatani valley - Kayukawa river - Aioi - Urura, Gujo city, Gifu pref.; Itadori - Ichiba - Horado, Seki city, Gifu pref.; Tsubaki, Yamagata city, Gifu pref.; Warabi, Mino city, Gifu pref.
• Fossils (Limestone, Fusulinids): Acervoschwagerina fujimotoi, Cancellina nipponica, Maklaya pamirica, Mesoschubertella shimadaniensis, Minojaponella elongata, Misellina claudiae, Nankinella sp., Neofusulinella paraecursor, Neoschwagerina douvillei, Neoschwagerina nipponica, Ozawainella sp., Parafusulina cf. japonica, Parafusulina (Shinnerella) cf. sappeli, Paraschwagerina yanagidai, Pseudofusulina ambigua, Pseudofusulina cf. crassiseptata, Pseudofusulina gujoensis, Pseudofusulina horadaniensis, Pseudofusulina kraffti, Pseudofusulina krotowi, Pseudofusulina vulgaris, Pseudofusulina vulgaris pseudowatanabei, Pseudofusulina nelsoni, Pseudofusulina otukai, Pseudofusulina paratschernyschewi, Pseudofusulina vulgaris pseudowatanabei, Pseudoschwagerina uddeni, Schubertella kingi, Schubertella cf. melonica, Schwagerina? annamitica, Staffella depressa, Verbeekina verbeeki,
• Fossils (Calcareous algae): Eogoniolina johnsoni, Mizzia velebitana
• Fossils (Radiolarians): Albaillella levis, Albaillella triangularis, Angulobracchia cf. digitata, Archaeodictyomitra spp., Archaeospongoprunum compactum, Canoptum sp., Capnodoce sp., Capnuchosphaera sp., Cyrtocapsa mastoidea, Dictyomitra sp., Dectyomitrella? kamoensis, Emiluvia spp., Eucyrtidium? unumaensis, Follicucullus scholasticus, Follicucullus ventricosus, Foremanina sp., Gorgansium spp., Hegiastrum sp., Hsuum maxwelli, Neoalbaillella cf. gracilis, Neoalbaillella optima, Orbiculiforma sp., Pantanellum foveatum, Parafollicucullus fusiformis, Parasaturnalis, Paronaella sp., Parvicingula sp., Podoburea sp., Pratunuma fusiformis, Pseudoalbaillella longicornis, Saitoum sp., Spongosaturnalis protoformis, Spongosaturnalis? hexagaonus, Spongonaturnalis? suboblongus, Spongosaturnalis? tetraspinus, Stichocapsa convexa, Stichocapsa himedaruma, Stichocapsa japonica, Stichocarya? sp., Tetraditryma cf. corralitosensis, Triassocampe cf. deweveri, Tricolocapsa? fusiformis, Tricolocapsa plicarum, Tricolocapsa cf. ruesti, Trillus sp., Trilonche? ordinaria, Tripocyclina? cf. japonica, Tritrabs cf. ewingi, Unuma echinatus, Zartus sp.
• Fossils (Conodonts): Anchignathodus minuta, Anchignathodus minutus permicus, Cypridodella sp., Diplognathodus angustus, Diplognthodus oertlii, Enntiognathus tribulosus, Epigondolella abneptis, Epidongolella bidentata, Epigondolella poster, Epigondolella primita, Glodigondolella tethydis, Gondolella bitteri, Ligonodina sp., Lonehodina spp., Neogondolella asiatica, Neogondolella babcocki, Neogondolella bisselli, Neogondolella bulgorica, Neogondolella constricta, Neogondolella gujioensis, Neogondolella idahoensis, Neogondolella intermedia, Neogondolella mombergensis?, Neogondolella navicula steinbergensis, Neogondolella polygnathiformis, Neogondolella serrata serrata, Neospathodus bicuspidatus, Neospathodus spp., Neostreptognathodus foliatus, Neostreptognathodus pequopensis, Neostreptognathodus toriyamai, Sweetognathus whitel, Synprioniodina sp. Xaniognathus abstractus, Xaniognathus deflectens, Xaniognathus kockeli, Xaniognathus sweeti
• Fossils: Trace fossils

• Sano (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.449-467 DOI
• Sano et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.6, pp.321-340 DOI
• Yamakita and Otoh (2000) Structural Geology, vol.44, pp.5-32
• Wakita (1995) Geology of the Mino District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 3p.)
• Wakita (1991) Geology of the Tanigumi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 53p. (in Japanese with English abstract 4p.)
• Wakita (1984) Geology of the Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 6p.)