Where: Washington County, Arkansas (35.9° N, 94.2° W: paleocoordinates 12.1° S, 35.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Pitkin Formation, Chesterian (339.4 - 318.1 Ma)

• The Pitkin formation is the uppermost Chesterian unit preserved in this part of the Ozarks. The Mississippian/Pennsylvanian unconformity cuts into the top of the Pitkin in this region and is overlain by the Morrowan age Hale Formation.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, shelly/skeletal grainstone and lithified, shelly/skeletal lime mudstone

Size classes: macrofossils, mesofossils

Collected by N. A. Heim in 2005

Collection methods: bulk, mechanical,

• A bulk sample of approximately 2 gallons was collected and fossils were removed in the lab by crack out.

Primary reference: N. A. Heim. 2009. Stability of regional brachiopod diversity structure across the Mississippian/Pennsylvanian boundary. Paleobiology 35(3):393 [N. Heim/N. Heim/N. Heim] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 79836: authorized by Noel Heim, entered by Noel Heim on 25.03.2008