Arkansas River (Carboniferous of the United States)

Where: Fremont County, Colorado (38.5° N, 105.9° W: paleocoordinates 0.1° S, 36.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Weber? Formation, Pennsylvanian (323.2 - 298.9 Ma)

• Near the base of the Pennsylvanian section

Environment/lithology: terrestrial; black shale

• black shale bed

Size class: macrofossils

Collection methods: surface (in situ),

Primary reference: C. A. Arnold. 1941. Some Paleozoic plants from Central Colorado and their stratigraphic significance. Contrib. Mus. Paleontol. University of Michigan 6:59-70 [H. Sims/S. Ostrowski/H. Sims]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11207: authorized by Hallie Sims, entered by Summer Ostrowski on 23.07.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

 Equisetales - Equisetidae
 Radiatopses - Medullosaceae
Neuropteris gigantea
"Neuropteris ? gigantea" = Paripteris gigantea
"Neuropteris ? gigantea" = Paripteris gigantea Sternberg 1825