Where: Niobrara County, Wyoming (43.2° N, 104.3° W: paleocoordinates 49.4° N, 72.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Baculites obtusus ammonoid zone, Pierre Shale Formation, Middle Campanian (83.5 - 70.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, concretionary shale

Size class: macrofossils

Collection methods: Repository: Black Hills Institute (BHI)

Primary reference: N. L. Larson. 2010. Fossil coleoids from the Late Cretaceous (Campanian & Maastrichtian) of the Western Interior. Ferrantia 59:78-113 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 212992: authorized by Matthew Clapham, entered by Matthew Clapham on 23.08.2020

Creative Commons license: CC BY (attribution)