Where: Madison County, Arkansas (36.1° N, 93.8° W: paleocoordinates 8.7° S, 31.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Prairie Grove Member (Hale Formation), Morrowan (318.1 - 314.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, lenticular grainstone and lithified, calcareous sandstone

Size class: macrofossils

Primary reference: W. L. Manger and W. B. Saunders. 1980. Lower Pennsylvanian (Morrowan) amminoids from the North American midcontinent. Paleontological Society Memoir (10) [J. Alroy/C. Simpson/C. Simpson] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43103: authorized by John Alroy, entered by Carl Simpson on 10.08.2004

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)