Where: Washington County, Arkansas (35.8° N, 93.0° W)

• Paleocoordinates: 18.1° S, 39.4° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pitkin Formation, Arnsbergian (327.0 - 323.7 Ma)

• Pitkin limestone, 2-3 ft below top of uppermost limestone bed.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by M. Gordon, H. Wagner in 1954; reposited in the USNM

Primary reference: M. Gordon. 1964. Carboniferous Cephalopods of Arkansas. United States Geological Survey Professional Paper 460:1-322 [J. Alroy/C. Simpson/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 160562: authorized by Matthew Clapham, entered by Matthew Clapham on 24.08.2014

Creative Commons license: CC0 (CC0)