Where: Niobrara County, Wyoming (43.2° N, 104.3° W: paleocoordinates 49.6° N, 79.2° 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 AMNH

Primary reference: N. H. Landman and K. M. Waage. 1993. Scaphitid ammonites of the Upper Cretaceous (Maastrichtian) Fox Hills Formation in South Dakota and Wyoming. Bulletin of the American Museum of Natural History 215:1-257 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 178313: authorized by Matthew Clapham, entered by Matthew Clapham on 30.04.2016

Creative Commons license: CC BY (attribution)