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Gozenyama Unit (Fujimoto, 1939) Hara et al., 2010

Invalid synonym: Gozenyama Formation, Ochigawa Formation, Nippara Formation, Mitsumine Formation

• Type locality: Mount Gozenyama, Okutama city, Nishitama county, Tokyo
• Accretionary complex
• Deposition (Limestone): Permian (Fusulinids), Triassic (Conodonts)
• Deposition (Chert): Triassic (Conodonts)
• Deposition (Siliceous shale): Middle - Late Jurassic; Early Cretaceous (Radiolarians)
• Deposition (Shale): Middle - Late Jurassic; Early Cretaceous (Radiolarians)
• Accretion: Late Jurassic, Tithonian - Early Cretaceous, Valanginian
• Correlation: Sanbosan Unit

• Sedimentary facies: Marine
• Metamorphic facies: Greenschist
• Lithofacies: Mélange facies, Broken facies, Limestone
• Lithofacies (Minor): Sandstone, Chert, Basaltic rocks
• Lithofacies (Broken facies): Interbedded sandstone and shale
• Matrix: Shale
• Exotic blocks (Crusts): Sandstone, Siliceous shale, Chert, Limestone

• Upper limit: Thrust fault (Kawanori Unit, Unazawa Unit)

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

• Distribution: Mount Gozenyama, Mount Araragiyama - Mount Tensosan - Tochiyori - Sakai - Kosuge - Osawa - Nippara, Okutama city, Nishitama county, Tokyo; Motoshuku, Hinohara city, Nishitama county, Tokyo; Odahara - Owa - Ochigawa river - Mount Myohogatake - Mount Kirimogamine - Mount Shiraiwayama, Chichibu city, Saitama pref.
• Fossils (Shale): Archaedictyomitra sp., Archaeospongoprunum imlyai, Dictyomitrella? kamoensis, Emiluvia sp., Holocryptocanium barbui, Hsuum hisuikyoense, Mirifusus mediodilatatus, Obesacapsula rotunda, Parvicingula boesii, Parvicingula dhimenaensis, Tricolocapsa conexa, Xitus sp.
• Fossils (Radiolarians): Acaeniotyle diaphrogona, Acaeniotyle umbilicata, Acanthocircus dicranoconthas, Alievium helenae, Angalobracchia digitata, Archaeodictyomitra sp., Areluneopspongoprunum imlayi, Crucella theakaftensis, Dibolackras? sp., Emilureina arca, Eplinginum japonicam, Eucyrtidium ptyctum, Gongylothorz sp., Gorganisium sp., Hemicryplocapsa capita, Hemicryplocapsa pseudopitala, Hemocabaranuella cf. elegans, Holocryptocanium sp. Hsuum sp., Mirifuesus baileyi, Mirifusus ramadolnpensis, Mirifusus mediodilatatus, Napora sp., Obesacapsida sp., Orbiculiformis? kunaamaensis, Pantanellium curriganensis, Panthanellium fischeri, Panthanellium riedeli, Parvicingul altissima, Parvicingula baesii, Parvicingula citae, Parvicingula nurshitaensis, Pentactinocarpus cf. acanthicus, Podobursa triacantha, Pordps? sp., Pratanama oekiensis, Praecanocaryonuma cf. hexagona, Pseudodictyomitra carpulica, Pseudodictyomitra puga, Sethacapsa irlercadus, Spongocapsula sp., Staurodarus euriabilis, Stictracapsa cf. cancesa, Sticlemitra sp., Stylocapsa catenarium, Stylocapsa oblengula, Stylocapsa? spiralis, Thanarla conica, Thanarla cf. eleganisiuma, Thanarla cf. pracvenela, Triassocampe sp., Tricalcapsa cunexa, Tricalcapsa plicarum, Tricalcapsa tetragona, Tripcyclia blakei, Tripacyclina trigonum, Tritrabe casunatiaensis, Tritrabe ewingi, Tritrabe exoltica, Tritrabe senrzeli, Xitus? sp.
• Fossils (Conodonts): Chirodella dinodoides, Cypridodella muelleri, Enantiognathus ziegleri, Epigondolella abneptis, Epigondolella bidentata, Epigondolella multidentata, Epigondolella primitia, Gladigondolella tethydis, Neogondolella cf. contraicta, Neogondolella navicula navicula, Neogondolella navicula steinbergensis, Neogondolella polygnathiformis, Neohindeodella aequiramosa, Neohindeodella suevica, Neohindeodella triassica
• Fossils (Limestone, Fusulinids): Biwaella? sp., Kahlerina sp., Neoschwagerina craticulifera, Schwagerina sp., Yabeina cf. cascadensis

• Hara et al. (2010) Geology of the Mitsumine District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 110p. (in Japanese with English abstract 4p.)
• Sakai (1987) Geology of the Itsukaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 5p.)