Where: Arkansas (35.8° N, 94.1° W: paleocoordinates 7.6° S, 30.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pseudoparalegoceras kesslerense ammonoid zone, Atoka Formation, Moscovian (315.2 - 307.0 Ma)

• Calcareous ferruginous sandstone less than 1 ft thick, Atoka formation, 125-150 ft above base

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, ferruginous, calcareous sandstone

Size class: macrofossils

Preservation: replaced with limonite

Collected by L.G. Henbest in 1947; 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 158005: authorized by Matthew Clapham, entered by Matthew Clapham on 13.07.2014

Creative Commons license: CC BY (attribution)