PTRM V98002, Cannonball Creek: Late/Upper Maastrichtian, North Dakota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Ceratopsidae
Ceratopsidae indet. Marsh 1888
8 specimens
Reptilia - Hadrosauridae
Hadrosaurinae indet. Lambe 1918
2 specimens
Reptilia
Brachychampsa montana Gilmore 1911
1 specimen
Reptilia - Testudines - Chelydridae
Chelydridae indet. Swainson 1839
1 specimen
Reptilia - Testudines - Adocidae
Adocus sp. Cope 1868
1 specimen
Reptilia - Testudines
Helopanoplia distincta Hay 1908
1 specimen
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
1 specimen
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis (Leidy 1856)
original and current combination Lepidotus occidentalis
Actinopteri - Amiiformes - Amiidae
Kindleia fragosa Jordan 1927
recombined as Cyclurus fragosus
see common names

Geography
Country:United States State/province:North Dakota County:Slope
Coordinates: 46.5° North, 104.0° West (view map)
Paleocoordinates:52.7° North, 77.3° West
Basis of coordinate:based on nearby landmark
Altitude:852 meters
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Late/Upper Maastrichtian
Age range of interval:70.60000 - 66.00000 m.y. ago
Stratigraphy
Formation:Hell Creek
Local section:Cannonball Creek Local bed:16.00 m
Local order:top to bottom
Stratigraphic resolution:bed
Stratigraphy comments: daum -16.00, K-T section 9840
Lithology and environment
Primary lithology: carbonaceous "shale"
Includes fossils?Y
Environment:crevasse splay
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:macrofossils,mesofossils
Disassociated major elements:many
Disassociated minor elements:many
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:45309
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:G. Varnham Research group:vertebrate
Created:2004-10-19 10:28:42 Last modified:2022-02-01 07:52:35
Access level:the public Released:2004-10-19 10:28:42
Creative Commons license:CC BY
Reference information

Primary reference:

11749.ETE D. A. Pearson, T. Schaefer, K. R. Johnson, D. J. Nichols, and J. P. Hunter. 2002. Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota. In J. H. Hartman, J. R. Johnson, and D. J. Nichols (eds.), The Hell Creek Formation and the Cretaceous-Tertiary Boundary in the Northern Great Plains: An Integrated Continental Record of the End of the Cretaceous, Geological Society of America Special Paper 361:145-167 [M. Carrano/M. Carrano/M. Carrano]