Chinomi River CU-CM, Urakawa, sample CM22: Santonian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polycystinea - Spumellaria
Lithatractus pusillus (Campbell and Clark 1944)
Polycystinea - Spumellaria - Stylosphaeridae
Polycystinea - Spumellaria - Orbiculiformidae
Polycystinea - Spumellaria - Archaeospongoprunidae
Polycystinea - Spumellaria - Pyramispongiidae
Polycystinea - Spumellaria - Pseudoaulophacidae
Polycystinea - Spumellaria - Hagiastridae
Crucella espartoensis Pessagno 1971
Polycystinea - Spumellaria - Spongodiscidae
Polycystinea - Nassellaria - Amphipyndacidae
Amphipyndax stocki (Campbell and Clark 1944)
Polycystinea - Nassellaria - Archaeodictyomitridae
Dictyomitra formosa Squinabol 1904
Polycystinea - Nassellaria - Acropyramididae
Cornutella californica informal var. B Campbell and Clark 1944
Polycystinea - Nassellaria - Xitidae
Polycystinea - Nassellaria - Eucyrtidiidae
Polycystinea - Nassellaria - Neosciadiocapsidae
Polycystinea - Nassellaria - Carpocaniidae
Polycystinea - Nassellaria - Artostrobiidae
Theocampe apicata Foreman 1971
Polycystinea - Nassellaria - Cannobotryidae
Rhopalosyringium cf. magnificum Campbell and Clark 1944
see common names

Geography
Country:Japan State/province:Hokkaido
Coordinates: 42.2° North, 142.8° East (view map)
Paleocoordinates:46.5° North, 147.3° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:hand sample
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Santonian 10 m.y. bin: Cretaceous 6
Key time interval: Santonian
Age range of interval: 85.7 - 83.6 m.y. ago
Stratigraphy
Geological group:Upper Yezo Formation:Urakawa Member:U1
Local section:Chinomi River Local bed:17
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: sample CM22, Orbiculiforma quadrata zone
Lithology and environment
Primary lithology: lithified claystone
Lithology description: claystone with thin layers of sandstone
Environment:basinal (siliciclastic)
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:96039
Authorizer:W. Kiessling Enterer:U. Merkel
Research group:micropaleontology
Created:2010-05-07 06:44:29 Last modified:2025-02-22 15:12:02
Access level:the public Released:2010-05-07 06:44:29
Creative Commons license:CC0
Reference information

Primary reference:
32589. Y. Taketani. 1982. Cretaceous radiolarian biostratigraphy of the Urakawa and Obira areas, Hokkaido. The Science Reports of the Tohoku University, Serie 2: Geology 52:1-76 [W. Kiessling/U. Merkel]