Where: Jefferson County, Colorado (39.7° N, 105.2° W: paleocoordinates 46.4° N, 81.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Hoploscaphites birkelundae ammonoid zone, Pierre Shale Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)
• Upper transition member of the Pierre Shale
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Collection methods: Repository: Colorado School of Mines
Primary reference: N. H. Landman and W. A. Cobban. 2003. Ammonites from the upper part of the Pierre Shale and Fox Hills Formation of Colorado. American Museum Novitates 3388:1-45 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 178297: authorized by Matthew Clapham, entered by Matthew Clapham on 30.04.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Hoploscaphites cf. birkelundae Landman and Waage 1993 ammonite |