Where: Crawford County, Arkansas (35.6° N, 94.4° W: paleocoordinates 8.8° S, 32.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Witts Springs Formation, Morrowan (323.2 - 318.6 Ma)

• Lays above the Bloyd shale, and is distinguished by lithology, paleontology and sedimentary structures from the above Akota formation.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, ferruginous, conglomeratic, calcareous sandstone

Size class: macrofossils

Primary reference: J. A. McCaleb. 1963. The Goniatite Fauna from the Pennsylvanian Winslow formation of northwest Arkansas. Journal of Paleontology 37(4):110-115 [J. Alroy/C. Simpson/C. Simpson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43441: authorized by John Alroy, entered by Carl Simpson on 13.08.2004

Creative Commons license: CC BY (attribution)