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Ogamata Unit (Fujimoto et al., 1957) Hara et al., 2010
Invalid synonym: Ogamata Formation
- Accretionary complex
- Deposition (Limestone): Late Carboniferous - Late Permian (Fusulinids)
- Deposition (Chert): Early - Middle Jurassic (Radiolarians)
- Deposition (Shale): Middle Jurassic (Radiolarians)
- Accretion: Middle Jurassic
- Correlation: Ohirayama Unit
- Sedimentary facies: Marine
- Lithofacies: Sandstone, Interbedded sandstone and shale, Mélange facies
- Lithofacies (Minor): Chert, Limestone, Basalt lava, Volcaniclastic rocks, Conglomerate
- Matrix: Shale
- Matrix (Minor): Sandstone, Siliceous shale, Tuffaceous shale
- Exotic blocks (Crusts): Sandstone, Chert, Limestone, Basaltic rocks
- Sedimentary structures: Groove cast
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nakatsugawa, Otaki, Chichibu city, Saitama pref.; Mount Hakutaisan, Chichibu city, Saimata pref.
- Fossils (Limestone gravels): Fusulinids
- Fossils (Limestone, Fusulinids): Codonofusiella sp., Dunbarula sp., Lepidolina shiraiwensis, Neoschwagerina sp., Paradoxiella japonica, Schbertella sp., Schwagerina otakiensis, Yabeina igoi
- Fossils (Chert, Radiolarians): Hsuum minoratum, Parahsuum sp., Parvicingula gigantocornis, Stichocapsa spp., Tricolocapsa plicarum, Tricolocapsa? fujiformis, Trillus sp.
- Fossils (Shale, Radiolarians): Archaeodictyomitra spp., Archicapsa sp., Dictyomitrella? kamoensis, Eucyrtidiellum ptyctum, Eucyrtidiellum pustulatum, Eucyrtidiellum unumaense, Hsuum maxwelli, Guexella nudata, Mirifusus guadalupensis, Pantanellium spp., Parahsuum spp., Parvicingula dhimenaensis, Protunuma? ochiensis, Protunuma turbo, Ristola altissima, Stichocapsa spp., Tricolocapsa plicarum, Tricolocapsa conexa, Tricolocapsa ruesti, Tricolocapsa tetragona, Unuma echinatus, Unuma typicus
- 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.)