Where: Routt County, Colorado (40.3° N, 105.0° W: paleocoordinates 46.7° N, 74.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Williams Fork Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

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 178543: authorized by Matthew Clapham, entered by Matthew Clapham on 07.05.2016

Creative Commons license: CC BY (attribution)