Where: Meade County, South Dakota (44.4° N, 102.6° W: paleocoordinates 50.0° N, 70.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Baculites compressus ammonoid zone, Pierre Shale Formation (Montana Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, concretionary mudstone

Size class: macrofossils

Collected by Jim Michaud

• 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 212982: authorized by Matthew Clapham, entered by Matthew Clapham on 23.08.2020

Creative Commons license: CC BY (attribution)