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)
• "200 cm thick" and "21.10 m below the pollen-defined K/T boundary"
• group of beds-level stratigraphic resolution
Environment/lithology: "floodplain"; silty mudstone
Size class: macrofossils
Preservation: adpression
Collected in 1996 - 2000
• PTRM collection
Primary reference: G. E. Knauss, W. G. Joyce, T. R. Lyson and D. Pearson. 2011. A new kinosternoid from the Late Cretaceous Hell Creek Formation of North Dakota and Montana and the origin of the Dermatemys mawii lineage. Palaeontologische Zeitschrift 85:125-142 [J. Alroy/J. Alroy/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 99589: authorized by John Alroy, entered by John Alroy on 16.11.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Reptilia | |
Hoplochelys clark n. sp.
Hoplochelys clark n. sp. Knauss et al. 2011 mud turtle | |
Angiospermae | |
"Dryophyllum" subfalcatum Lesquereux 1875 | |
"Rhamnus" cleburni Lesquereux 1872 buckthorn | |
Marmarthia trivalis laurel | |
Sequoia sp. Endlicher 1847 coast redwood |