PTRM V96015, Cannonball Creek (Cretaceous of the United States)

Where: Slope County, North Dakota (46.5° N, 104.0° W: paleocoordinates 52.9° N, 77.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• datum -8.41, K-T section 9144

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; silty mudstone

Size classes: macrofossils, mesofossils

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 45313: authorized by Matthew Carrano, entered by Matthew Carrano on 19.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Amiiformes - Amiidae
Melvius thomasi, "Kindleia fragosa" = Cyclurus fragosus
Melvius thomasi Bryant 1987 bowfin
"Kindleia fragosa" = Cyclurus fragosus Jordan 1927 bowfin
 Lepisosteiformes - Lepisosteidae
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Testudines -
Compsemys victa Leidy 1856 turtle
 Testudines - Baenidae
Baenidae indet. Cope 1882 turtle
Plesiobaena antiqua Lambe 1902 turtle
 Testudines - Nanhsiungchelyidae
Basilemys sinuosa Riggs 1906 turtle
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
Aves
 Ornithurae -
Hesperornithiformes indet. F├╝rbringer 1888 bird
Reptilia
 Neornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Neornithischia - Hadrosauridae
Hadrosaurinae indet. Lambe 1918 hadrosaurine
 Crocodylia -
"Leidyosuchus sternbergi" = Borealosuchus sternbergii, Brachychampsa montana
"Leidyosuchus sternbergi" = Borealosuchus sternbergii Gilmore 1910 crocodilian
Brachychampsa montana Gilmore 1911 crocodilian