Where: Chickasaw County, Mississippi (34.1° N, 89.0° W: paleocoordinates 37.6° N, 66.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Prairie Bluff Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; chalk

Size class: macrofossils

Collected by W.H. Monroe; reposited in the USNM

Primary reference: C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 197610: authorized by Matthew Clapham, entered by Matthew Clapham on 17.11.2018

Creative Commons license: CC BY (attribution)