Alpena Bed 4 Collection 3 (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 (335.5 - 323.2 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 79828: authorized by Noel Heim, entered by Noel Heim on 25.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• only brachiopods were collected. Individuals were counted using the minimum number of individuals method: articulated + the larger of the number of brachial or pedicle valves.
Show authors, comments, and common names
Rhynchonellata
 Athyridida - Retziidae
Eumetria sp.
 Athyridida - Athyrididae
Composita sp.
Composita sp. Brown 1849
 Terebratulida - Dielasmatidae
Dielasma sp.
Dielasma sp. Beede and Rogers 1900
 Spiriferida - Elythidae
Torynifer sp.
 Spiriferida - Spiriferidae
Spirifer sp.
Spirifer sp. Sowerby 1818