ammonites
Alpena Bed 3 Collection 1 (Carboniferous of the United States)

Where: Carroll County, Arkansas (36.3° N, 93.2° W: paleocoordinates 12.2° S, 34.8° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• The Hindsville formation is the lowermost Chesterian unit in northern Arkansas and unconformably overlies the Meramecian Boone Formation.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, ooidal, shelly/skeletal grainstone

• Bioclastic grainstone with ooids and abundant brachiopods.

Size classes: macrofossils, mesofossils

Collected by N. A. Heim in 2004

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 79824: authorized by Noel Heim, entered by Noel Heim on 25.03.2008