Where: Grand County, Colorado (40.2° N, 106.4° W: paleocoordinates 47.0° N, 76.0° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Baculites cuneatus ammonoid zone, Pierre Shale Formation, Late/Upper Campanian (83.5 - 70.6 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, concretionary siltstone
Size class: macrofossils
Collected by G.R. Scott, W.A. Cobban in 1957; reposited in the USNM
Primary reference: W. J. Kennedy, W. A. Cobban, and G. R. Scott. 2000. Heteromorph ammonites from the Upper Campanian (Upper Cretaceous) Baculites cuneatus and Baculites reesidei zones of the Pierre Shale in Colorado, USA. Acta Geologica Polonica 50:1-20 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 178536: authorized by Matthew Clapham, entered by Matthew Clapham on 06.05.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Didymoceras draconis Stephenson 1941 ammonite | |
Baculites cuneatus Cobban 1962 ammonite |