Where: Sheridan County, Wyoming (44.2° N, 106.8° W: paleocoordinates 44.2° N, 66.9° W)

• coordinate stated in text

• hand sample-level geographic resolution

When: Acanthoceras amphibolum ammonoid zone, Belle Fourche Member (Frontier Formation), Middle Cenomanian (99.6 - 93.5 Ma)

• Soap Creek Bentonite Bed

• formation-level stratigraphic resolution

Environment/lithology: marine; shale

Size classes: macrofossils, mesofossils

Primary reference: W. A. Cobban. 1987. Some Middle Cenomanian (Upper Cretaceous) acanthoceratid ammonites from the Western Interior of the United States. United States Geological Survey Professional Paper 1445:1-28 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 231777: authorized by Pete Wagner, entered by Pete Wagner on 07.09.2023

Creative Commons license: CC BY (attribution)