Where: Dewey County, South Dakota (45.1° N, 101.2° W: paleocoordinates 50.9° N, 74.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hoploscaphites nicolletii ammonoid zone, Trail City Member (Fox Hills Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Upper nicolletii Assemblage Zone (UNAZ)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Reposited in the YPM

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 178562: authorized by Matthew Clapham, entered by Matthew Clapham on 07.05.2016

Creative Commons license: CC BY (attribution)