Where: Niobrara County, Wyoming (43.4° N, 104.3° W: paleocoordinates 49.8° N, 79.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Reposited in the USNM

Primary reference: W. J. Kennedy, N. H. Landman, and W. A. Cobban. 1996. The Maastrichtian ammonites Coahuilites sheltoni Böse, 1928, and Sphenodiscus pleurisepta (Conrad, 1857), from the uppermost Pierre Shale and basal Fox Hills Formation of Colorado and Wyoming. American Museum Novitates 3186:1-14 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 178307: authorized by Matthew Clapham, entered by Matthew Clapham on 30.04.2016

Creative Commons license: CC BY (attribution)