Where: Jackson County, Arkansas (35.5° N, 91.4° W: paleocoordinates 39.1° N, 70.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Clayton Formation (Midway Group), Danian (66.0 - 61.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: mesofossils

Primary reference: K. V. Palmer and D. C. Brann. 1965. Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Peteropoda, Scaphopoda and Cephalopoda. Bulletins of American Paleontology 48:1-471 [M. Kosnik/M. Kosnik/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91870: authorized by Jocelyn Sessa, entered by Laurie Eccles on 22.10.2009

Creative Commons license: CC BY (attribution)