Where: Weld County, Colorado (40.3° N, 104.9° W: paleocoordinates 46.9° N, 80.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hoploscaphites birkelundae ammonoid zone, Fox Hills Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Sandstone about 40 ft (12.2 m) below the base of the Milliken Sandstone Member of the Fox Hills Formation

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Reposited in the AMNH

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 178283: authorized by Matthew Clapham, entered by Matthew Clapham on 29.04.2016

Creative Commons license: CC BY (attribution)