Ki208F, nodule in Yon-no-sawa stream: Late Coniacian, Japan
collected by M. Futakami

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Myalinida - Inoceramidae
Cephalopoda - Ammonitida - Collignoniceratidae
(1 measurement)
Cephalopoda - Ammonitida - Scaphitidae
see common names

Geography
Country:Japan
Coordinates: 43.3° North, 142.0° East (view map)
Paleocoordinates:51.3° North, 139.5° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:hand sample
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Coniacian 10 m.y. bin: Cretaceous 6
Key time interval: Late Coniacian Inoceramid zone:  Inoceramus uwajimensis
Age range of interval: 89.8 - 85.7 m.y. ago
Stratigraphy
Geological group:Yezo
Stratigraphic resolution:bed
Stratigraphy comments: Probably derived from the Member U2, the lower part of the Upper Yezo Group. In the same nodule Scaphites pseudoequalis and I. cf. uwajimensis were contained abundantly. Thus, the age is probably early to middle (?) Coniacian. PJW: Inoceramus uwajimensis (= Inoceramus undabundus) zone is equivalent to the Inoceramus stantoni elsewhere, which is Late Coniacian.
Lithology and environment
Primary lithology:nodular lithified "siliciclastic"
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:M. Futakami
Collection method comments: Repository: National Science Museum, Tokyo
Metadata
Database number:181022
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:P. Wagner Research group:marine invertebrate
Created:2016-08-13 23:12:51 Last modified:2025-02-22 15:12:02
Access level:the public Released:2016-08-13 23:12:51
Creative Commons license:CC0
Reference information

Primary reference:
60111. M. Futakami. 1991. Coniacian collignoniceratid ammonites from Hokkaido. Journal of Kawamura Gakuen Woman's University 2:257-275 [M. Clapham/M. Clapham/M. Clapham]